1.
Russian Academy of Sciences
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Headquartered in Moscow, the Academy is considered a civil, self-governed, non-commercial organization chartered by the Government of Russia. It combines the members of RAS and scientists employed by institutions, the Academy currently includes around 650 institutions and 55,000 scientific researchers. There are three types of membership in the RAS, full members, corresponding members, and foreign members, Academicians and corresponding members must be citizens of the Russian Federation when elected. However, some academicians and corresponding members were elected before the collapse of the USSR and are now citizens of other countries, Members of RAS are elected based on their scientific contributions – election to membership is considered very prestigious. In the years 2005–2012, the academy had approximately 500 full and 700 corresponding members, but in 2013, after the Russian Academy of Agricultural Sciences and the Russian Academy of Medical Sciences became incorporated into the RAS, a number of the RAS members accordingly increased. As of November 2016, after the last elections, there were 944 full members and 1159 corresponding members in the renewed Russian Academy of Sciences, the RAS consists of 13 specialized scientific divisions, three territorial divisions, sometimes called branches, and 15 regional scientific centers. The Academy has numerous councils, committees, and commissions, all organized for different purposes, Siberian Division of the Russian Academy of Sciences The Siberian Division was established in 1957, with Mikhail Lavrentyev as founding chairman. Research centers are in Novosibirsk, Tomsk, Krasnoyarsk, Irkutsk, Yakutsk, Ulan-Ude, Kemerovo, Tyumen, as of 2005, the Division employed over 33,000 employees,58 of whom were members of the Academy. Ural Division of the Russian Academy of Sciences The Ural Division was established in 1932, research centers are in Yekaterinburg, Perm, Cheliabinsk, Izhevsk, Orenburg, Ufa and Syktyvkar. As of 2007, the Division employed 3,600 scientists,590 full professors,31 full members, started with just three members, The RSSI now has 3,100 members, including 57 from the largest research institutions. Russian universities and technical institutes are not under the supervision of the RAS, the Academy is also increasing its presence in the educational area. In 1990 the Higher Chemical College of the Russian Academy of Sciences was founded, the Academy gives out a number of different prizes, medals and awards among which, Lomonosov Gold Medal Lobachevsky Prize Demidov Prize Kurchatov Medal Pushkin Prize S. V. Expeditions to explore parts of the country had Academy scientists as their leaders or most active participants. A separate organization, called the Russian Academy, was created in 1783 to work on the study of the Russian language, presided over by Princess Yekaterina Dashkova, the Russian Academy was engaged in compiling the six-volume Academic Dictionary of the Russian Language. The Russian Academy was merged into the Imperial Saint Petersburg Academy of Sciences in 1841, in December 1917, Sergey Fedorovich Oldenburg, a leading ethnographer and political activist in the Kadet party, met with Vladimir Lenin to discuss the future of the Academy. They agreed that the expertise of the Academy would be applied to addressing questions of state construction, in 1925 the Soviet government recognized the Russian Academy of Sciences as the highest all-Union scientific institution and renamed it the Academy of Sciences of the USSR. The Soviet Sciences Academy would be affected like all universities by the rules imposed particularly those pertaining to censorship, the Soviet Science Academy ended up with a leader of the philosophy department who was placed there simply to keep the man out of trouble. The government decided to not execute or send the famous writer to the gulag because he had won the Stalin award, doing this would have discredited the Stalin award and thus Stalin the leader of the Communist party himself
2.
Bion (satellite)
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The Bion satellites, also named Biocosmos, were a series of Soviet biosatellites. They were part of the Kosmos satellites, the Soviet biosatellite program began in 1966 with Kosmos 110, and resumed in 1973 with Kosmos 605. Cooperation in space ventures between the Soviet Union and the United States was initiated in 1971, with the signing of the United States and Soviet Union in Science and Applications Agreement. The Soviet Union first offered to fly US experiments on a Kosmos biosatellite in 1974, the offer was realized in 1975 when the first joint U. S. /Soviet research were carried out on the Kosmos 782 mission. The Bion spacecraft were based on the Zenit and launches began in 1973 with primary emphasis on the problems of radiation effects on human beings, launches in the program included Kosmos 110,605,690,782, plus Nauka modules flown on Zenit-2M reconnaissance satellites. 90 kg of equipment could be contained in the external Nauka module, the Soviet/Russian Bion program provided U. S. investigators a platform for launching Fundamental Space Biology and biomedical experiments into space. The Bion program, which began in 1966, included a series of missions that flew biological experiments using primates, rodents, insects, cells, NASA became involved in the program in 1975 and participated in 9 of the 11 Bion missions. NASA ended its participation in the program with the Bion 11 mission launched in December 1996, the collaboration resulted in the flight of more than 100 U. S. experiments, one-half of all U. S. Life Sciences flight experiments accomplished with non-human subjects, the missions ranged from five days to around 22 days. In 2005 the Bion program was resumed with three new satellites of the modified Bion-M type – the first flight was launched April 19,2013 from Baikonur cosmodrome, Kazakhstan. All the gerbils died due to a failure, but condition of the rest of the experiments. Half the mice died as was predicted, Zenit Satellites - Bion Variant Astronautix, Bion TsSKB, Bion images RW Ballard, and JP Connolly. Joint research in biology and medicine on Kosmos biosatellites
3.
Soyuz-U
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The Soyuz-U launch vehicle was an improved version of the original Soyuz rocket. Soyuz-U was part of the R-7 family of rockets based on the R-7 Semyorka missile, members of this rocket family were designed by the TsSKB design bureau and constructed at the Progress Factory in Samara, Russia. The first Soyuz-U flight took place on 18 May 1973, carrying as its payload Kosmos 559, the final flight of a Soyuz-U rocket took place on February 22,2017, carrying Progress MS-05 to the International Space Station. Soyuz-U was in use continuously for almost 44 years, the longest lifetime of an orbital rocket worldwide, Production of R-7 derived launch vehicles peaked in the late 1970s-early 1980s at 55–60 a year. Soyuz-U held the record of highest launch rate in a year in 1979 with 47 flights. Over its operational lifetime, the Soyuz-U variant flew a total of 786 missions, Soyuz-U has also been one of the most reliable launchers, with a success rate of 97. 3%. The earlier Soyuz 11A511 was the first attempt at creating a standardized R-7 core in place of the variations that had been used up to 1966. Starting that year, the 11A511 Blok I and strap-on boosters were added to the Voskhod, Vostok-2, two versions of Soyuz-U were fitted with an additional upper stage, Soyuz-U/Ikar with the Ikar third stage, produced by the Progress State Research and Production Rocket Space Center, TsSKB-Progress. Ikar is used to deliver various payloads with masses of 750 kg to 3920 kg to heights 250 km to 1400 km. The performance of the Ikar upper stage is lower than that of the Fregat upper stage and this version was launched 6 times in 1999, carrying four GlobalStar satellites on each mission. Soyuz-U/Fregat with the Fregat third stage, developed and produced by Lavochkin Association in Khimki and this version only flew 4 times in 2000, the Fregat upper stage was subsequently flown regularly atop Soyuz-FG and Soyuz-2 boosters. An older variant of Soyuz-U, the Soyuz-U2 launcher, first flown in 1982, had the hardware as the basic Soyuz-U. Instead of standard RP-1, it used an energy, synthetic version, Syntin. This variant, mainly used to crew and cargo to the Mir space station, last flew in 1995. Soyuz-U was the platform for the development of the Soyuz-FG variant. Since 2013, both Soyuz-U and Soyuz-FG are gradually being replaced by the modernized Soyuz-2 launch vehicle, the first use of a Soyuz-U to launch a crewed mission took place 2 December 1974, when the Soyuz 16 crew was launched in preparation for the Apollo-Soyuz Test Project. Soyuz 19, which as part of the ASTP docked with the last Apollo spacecraft ever flown, was launched by a Soyuz-U rocket. On 6 July 1976 a Soyuz-U launched Soyuz 21, which took a crew of two to the Salyut 5 space station, many subsequent space station crews were launched on Soyuz-U launchers
4.
Plesetsk Cosmodrome
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Plesetsk Cosmodrome, a Russian spaceport located in Mirny, Arkhangelsk Oblast, about 800 km north of Moscow and approximately 200 km south of Arkhangelsk, dates from 1957. Originally developed as an ICBM site for the R-7 missile, it served for numerous satellite launches using the R-7. With the end of the Soviet Union, Baikonur became foreign territory, consequently Plesetsk has seen considerably more activity since the 2000s. It is situated in a region of taiga, or flat terrain with boreal pine forests, the Soyuz rocket, Cosmos-3M, Rockot, Tsyklon, and Angara are launched from the Plesetsk Cosmodrome. The heavy Proton and Zenit rockets can only be land-launched from Baikonur, on 11 January 1957 the Soviet government passed the resolution about the foundation of special military object with secret name Angara. This secret object had to be situated in Plesetsk District, Arhangelsk Oblast and it was named after the town of Plesetsk. The first Soviet Combat formation of intercontinental ballistic missiles R-7 of general designer Sergei Korolev had to be located in that place, the official birthday of the proving ground was 15 July 1957. That day Colonel Gregorjev assumed his post as the unit commander. By 15 July 1961, four missile complexes for R-7 ICBMs were at combat status, in the summer of 1963, the leadership of the state is decided on the use of launch facilities in Plesetsk for launching spacecraft. In September 1963 the Council of Ministers of the USSR 3rd ALM, three test management, employees of combat duty, tests of rocket and space complexes, holding and processing of telemetry and trajectory measurements. And from 1964 on the basis of rocket connection started the establishment of research proving ground missiles and space weapons. Such conversion were the geographical location and a significant number of systems already deployed by the end of 1964 were on duty, four launchers R-7A, seven PU P-16U. Since then, the landfill has developed in two directions, rocket and space,17 March 1966 was the space birthday of Plesetsk. That day was the first missile launching of the rocket booster Vostok with space vehicle Cosmos 112, since that time the rocket base Angara has become cosmodrome Plesetsk. Construction started in 1957 and it was declared operational for R-7 rockets in December 1959, the urban-type settlement of Plesetsk in Arkhangelsk Oblast had a railway station, essential for the transport of missile components. A new town for the support of the facility was named Mirny, Russian for peaceful. By 1997, more than 1,500 launches to space had made from the site, more than for any other launch facility. Meteor 1-2 satellite launch from Plesetsk on 6 October 1969 was one of the earliest launches observed and photographed from Finland
5.
Plesetsk Cosmodrome Site 43
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Site 43, also known as SK-3 and SK-4, is a launch complex at the Plesetsk Cosmodrome in Russia. It consists of a two pads, Sites 43/3 and 43/4, and has been used by R-7 derived rockets since the early 1960s, the site was originally built for use by R-7A Semyorka missiles. The first launch to use the complex was an R-7A test on 21 December 1965, the first launch from 43/4 followed on 25 July 1967. After its retirement from service as a base, it was converted for use as a space launch complex. The first orbital launch was of a Voskhod rocket with Kosmos 313 on 3 December 1969, both pads were damaged by explosions in the 1980s. At 16,01 GMT on 18 March 1980,48 were killed when a Vostok-2M exploded during fueling operations at Pad 4, the disaster killed 50 people and injured dozens more, while damaging the pad so severely that it was not used again until 1984. On 18 June 1987, a Soyuz-U rocket exploded at liftoff on Pad 3, both were rebuilt, and are in service as of 2009
6.
Kazakhstan
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Kazakhstan, officially the Republic of Kazakhstan, is a transcontinental country in northern Central Asia and Eastern Europe. Kazakhstan is the worlds largest landlocked country, and the ninth largest in the world, Kazakhstan is the dominant nation of Central Asia economically, generating 60% of the regions GDP, primarily through its oil/gas industry. It also has vast mineral resources, Kazakhstan is officially a democratic, secular, unitary, constitutional republic with a diverse cultural heritage. Kazakhstan shares borders with Russia, China, Kyrgyzstan, Uzbekistan, and Turkmenistan, the terrain of Kazakhstan includes flatlands, steppe, taiga, rock canyons, hills, deltas, snow-capped mountains, and deserts. Kazakhstan has an estimated 18 million people as of 2014, Given its large area, its population density is among the lowest. The capital is Astana, where it was moved in 1997 from Almaty, the territory of Kazakhstan has historically been inhabited by nomadic tribes. This changed in the 13th century, when Genghis Khan occupied the country as part of the Mongolian Empire, following internal struggles among the conquerors, power eventually reverted to the nomads. By the 16th century, the Kazakh emerged as a distinct group, the Russians began advancing into the Kazakh steppe in the 18th century, and by the mid-19th century, they nominally ruled all of Kazakhstan as part of the Russian Empire. Following the 1917 Russian Revolution, and subsequent civil war, the territory of Kazakhstan was reorganised several times, in 1936, it was made the Kazakh Soviet Socialist Republic, part of the Soviet Union. Kazakhstan was the last of the Soviet republics to declare independence during the dissolution of the Soviet Union in 1991, Kazakhstan has worked to develop its economy, especially its dominant hydrocarbon industry. Kazakhstans 131 ethnicities include Kazakhs, Russians, Uzbeks, Ukrainians, Germans, Tatars, the Kazakh language is the state language, and Russian has equal official status for all levels of administrative and institutional purposes. The name Kazakh comes from the ancient Turkic word qaz, to wander, the name Cossack is of the same origin. The Persian suffix -stan means land or place of, so Kazakhstan can be translated as land of the wanderers. Kazakhstan has been inhabited since the Neolithic Age, the regions climate, archaeologists believe that humans first domesticated the horse in the regions vast steppes. Central Asia was originally inhabited by the Scythians, the Cuman entered the steppes of modern-day Kazakhstan around the early 11th century, where they later joined with the Kipchak and established the vast Cuman-Kipchak confederation. Under the Mongol Empire, the largest in history, administrative districts were established. These eventually came under the rule of the emergent Kazakh Khanate, throughout this period, traditional nomadic life and a livestock-based economy continued to dominate the steppe. Nevertheless, the region was the focus of ever-increasing disputes between the native Kazakh emirs and the neighbouring Persian-speaking peoples to the south, at its height the Khanate would rule parts of Central Asia and control Cumania
7.
Geocentric orbit
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A geocentric orbit or Earth orbit involves any object orbiting the Earth, such as the Moon or artificial satellites. In 1997 NASA estimated there were approximately 2,465 artificial satellite orbiting the Earth and 6,216 pieces of space debris as tracked by the Goddard Space Flight Center. Over 16,291 previously launched objects have decayed into the Earths atmosphere, altitude as used here, the height of an object above the average surface of the Earths oceans. Analemma a term in astronomy used to describe the plot of the positions of the Sun on the celestial sphere throughout one year, apogee is the farthest point that a satellite or celestial body can go from Earth, at which the orbital velocity will be at its minimum. Eccentricity a measure of how much an orbit deviates from a perfect circle, eccentricity is strictly defined for all circular and elliptical orbits, and parabolic and hyperbolic trajectories. Equatorial plane as used here, an imaginary plane extending from the equator on the Earth to the celestial sphere, escape velocity as used here, the minimum velocity an object without propulsion needs to have to move away indefinitely from the Earth. An object at this velocity will enter a parabolic trajectory, above this velocity it will enter a hyperbolic trajectory, impulse the integral of a force over the time during which it acts. Inclination the angle between a plane and another plane or axis. In the sense discussed here the reference plane is the Earths equatorial plane, orbital characteristics the six parameters of the Keplerian elements needed to specify that orbit uniquely. Orbital period as defined here, time it takes a satellite to make one orbit around the Earth. Perigee is the nearest approach point of a satellite or celestial body from Earth, sidereal day the time it takes for a celestial object to rotate 360°. For the Earth this is,23 hours,56 minutes,4.091 seconds, solar time as used here, the local time as measured by a sundial. Velocity an objects speed in a particular direction, since velocity is defined as a vector, both speed and direction are required to define it. The following is a list of different geocentric orbit classifications, Low Earth orbit - Geocentric orbits ranging in altitude from 160 kilometers to 2,000 kilometres above mean sea level. At 160 km, one revolution takes approximately 90 minutes, medium Earth orbit - Geocentric orbits with altitudes at apogee ranging between 2,000 kilometres and that of the geosynchronous orbit at 35,786 kilometres. Geosynchronous orbit - Geocentric circular orbit with an altitude of 35,786 kilometres, the period of the orbit equals one sidereal day, coinciding with the rotation period of the Earth. The speed is approximately 3,000 metres per second, high Earth orbit - Geocentric orbits with altitudes at apogee higher than that of the geosynchronous orbit. A special case of high Earth orbit is the elliptical orbit
8.
Low Earth orbit
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A low Earth orbit is an orbit around Earth with an altitude between 160 kilometers, and 2,000 kilometers. Objects below approximately 160 kilometers will experience very rapid orbital decay, with the exception of the 24 human beings who flew lunar flights in the Apollo program during the four-year period spanning 1968 through 1972, all human spaceflights have taken place in LEO or below. The International Space Station conducts operations in LEO, the altitude record for a human spaceflight in LEO was Gemini 11 with an apogee of 1,374.1 kilometers. All crewed space stations to date, as well as the majority of satellites, have been in LEO, objects in LEO encounter atmospheric drag from gases in the thermosphere or exosphere, depending on orbit height. Due to atmospheric drag, satellites do not usually orbit below 300 km, objects in LEO orbit Earth between the denser part of the atmosphere and below the inner Van Allen radiation belt. The mean orbital velocity needed to maintain a stable low Earth orbit is about 7.8 km/s, calculated for circular orbit of 200 km it is 7.79 km/s and for 1500 km it is 7.12 km/s. The delta-v needed to achieve low Earth orbit starts around 9.4 km/s, atmospheric and gravity drag associated with launch typically adds 1. 3–1.8 km/s to the launch vehicle delta-v required to reach normal LEO orbital velocity of around 7.8 km/s. Equatorial low Earth orbits are a subset of LEO and these orbits, with low inclination to the Equator, allow rapid revisit times and have the lowest delta-v requirement of any orbit. Orbits with an inclination angle to the equator are usually called polar orbits. Higher orbits include medium Earth orbit, sometimes called intermediate circular orbit, orbits higher than low orbit can lead to early failure of electronic components due to intense radiation and charge accumulation. Although the Earths pull due to gravity in LEO is not much less than on the surface of the Earth, people, a low Earth orbit is simplest and cheapest for satellite placement. It provides high bandwidth and low communication time lag, but satellites in LEO will not be visible from any point on the Earth at all times. Earth observation satellites and spy satellites use LEO as they are able to see the surface of the Earth more clearly as they are not so far away and they are also able to traverse the surface of the Earth. A majority of satellites are placed in LEO, making one complete revolution around the Earth in about 90 minutes. The International Space Station is in a LEO about 400 km above the Earths surface, since it requires less energy to place a satellite into a LEO and the LEO satellite needs less powerful amplifiers for successful transmission, LEO is used for many communication applications. Because these LEO orbits are not geostationary, a network of satellites is required to provide continuous coverage, lower orbits also aid remote sensing satellites because of the added detail that can be gained. Remote sensing satellites can also take advantage of sun-synchronous LEO orbits at an altitude of about 800 km, envisat is one example of an Earth observation satellite that makes use of this particular type of LEO. The LEO environment is becoming congested with space debris due to the frequency of object launches and this has caused growing concern in recent years, since collisions at orbital velocities can easily be dangerous, and even deadly
9.
Orbital eccentricity
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The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is an orbit, values between 0 and 1 form an elliptical orbit,1 is a parabolic escape orbit. The term derives its name from the parameters of conic sections and it is normally used for the isolated two-body problem, but extensions exist for objects following a rosette orbit through the galaxy. In a two-body problem with inverse-square-law force, every orbit is a Kepler orbit, the eccentricity of this Kepler orbit is a non-negative number that defines its shape. The limit case between an ellipse and a hyperbola, when e equals 1, is parabola, radial trajectories are classified as elliptic, parabolic, or hyperbolic based on the energy of the orbit, not the eccentricity. Radial orbits have zero angular momentum and hence eccentricity equal to one, keeping the energy constant and reducing the angular momentum, elliptic, parabolic, and hyperbolic orbits each tend to the corresponding type of radial trajectory while e tends to 1. For a repulsive force only the trajectory, including the radial version, is applicable. For elliptical orbits, a simple proof shows that arcsin yields the projection angle of a circle to an ellipse of eccentricity e. For example, to view the eccentricity of the planet Mercury, next, tilt any circular object by that angle and the apparent ellipse projected to your eye will be of that same eccentricity. From Medieval Latin eccentricus, derived from Greek ἔκκεντρος ekkentros out of the center, from ἐκ- ek-, eccentric first appeared in English in 1551, with the definition a circle in which the earth, sun. Five years later, in 1556, a form of the word was added. The eccentricity of an orbit can be calculated from the state vectors as the magnitude of the eccentricity vector, e = | e | where. For elliptical orbits it can also be calculated from the periapsis and apoapsis since rp = a and ra = a, where a is the semimajor axis. E = r a − r p r a + r p =1 −2 r a r p +1 where, rp is the radius at periapsis. For Earths annual orbit path, ra/rp ratio = longest_radius / shortest_radius ≈1.034 relative to center point of path, the eccentricity of the Earths orbit is currently about 0.0167, the Earths orbit is nearly circular. Venus and Neptune have even lower eccentricity, over hundreds of thousands of years, the eccentricity of the Earths orbit varies from nearly 0.0034 to almost 0.058 as a result of gravitational attractions among the planets. The table lists the values for all planets and dwarf planets, Mercury has the greatest orbital eccentricity of any planet in the Solar System. Such eccentricity is sufficient for Mercury to receive twice as much solar irradiation at perihelion compared to aphelion, before its demotion from planet status in 2006, Pluto was considered to be the planet with the most eccentric orbit
10.
Apsis
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An apsis is an extreme point in an objects orbit. The word comes via Latin from Greek and is cognate with apse, for elliptic orbits about a larger body, there are two apsides, named with the prefixes peri- and ap-, or apo- added to a reference to the thing being orbited. For a body orbiting the Sun, the point of least distance is the perihelion, the terms become periastron and apastron when discussing orbits around other stars. For any satellite of Earth including the Moon the point of least distance is the perigee, for objects in Lunar orbit, the point of least distance is the pericynthion and the greatest distance the apocynthion. For any orbits around a center of mass, there are the terms pericenter and apocenter, periapsis and apoapsis are equivalent alternatives. A straight line connecting the pericenter and apocenter is the line of apsides and this is the major axis of the ellipse, its greatest diameter. For a two-body system the center of mass of the lies on this line at one of the two foci of the ellipse. When one body is larger than the other it may be taken to be at this focus. Historically, in systems, apsides were measured from the center of the Earth. In orbital mechanics, the apsis technically refers to the distance measured between the centers of mass of the central and orbiting body. However, in the case of spacecraft, the family of terms are used to refer to the orbital altitude of the spacecraft from the surface of the central body. The arithmetic mean of the two limiting distances is the length of the axis a. The geometric mean of the two distances is the length of the semi-minor axis b, the geometric mean of the two limiting speeds is −2 ε = μ a which is the speed of a body in a circular orbit whose radius is a. The words pericenter and apocenter are often seen, although periapsis/apoapsis are preferred in technical usage, various related terms are used for other celestial objects. The -gee, -helion and -astron and -galacticon forms are used in the astronomical literature when referring to the Earth, Sun, stars. The suffix -jove is occasionally used for Jupiter, while -saturnium has very rarely used in the last 50 years for Saturn. The -gee form is used as a generic closest approach to planet term instead of specifically applying to the Earth. During the Apollo program, the terms pericynthion and apocynthion were used when referring to the Moon, regarding black holes, the term peri/apomelasma was used by physicist Geoffrey A. Landis in 1998 before peri/aponigricon appeared in the scientific literature in 2002
11.
Orbital inclination
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Orbital inclination measures the tilt of an objects orbit around a celestial body. It is expressed as the angle between a plane and the orbital plane or axis of direction of the orbiting object. For a satellite orbiting the Earth directly above the equator, the plane of the orbit is the same as the Earths equatorial plane. The general case is that the orbit is tilted, it spends half an orbit over the northern hemisphere. If the orbit swung between 20° north latitude and 20° south latitude, then its orbital inclination would be 20°, the inclination is one of the six orbital elements describing the shape and orientation of a celestial orbit. It is the angle between the plane and the plane of reference, normally stated in degrees. For a satellite orbiting a planet, the plane of reference is usually the plane containing the planets equator, for planets in the Solar System, the plane of reference is usually the ecliptic, the plane in which the Earth orbits the Sun. This reference plane is most practical for Earth-based observers, therefore, Earths inclination is, by definition, zero. Inclination could instead be measured with respect to another plane, such as the Suns equator or the invariable plane, the inclination of orbits of natural or artificial satellites is measured relative to the equatorial plane of the body they orbit, if they orbit sufficiently closely. The equatorial plane is the perpendicular to the axis of rotation of the central body. An inclination of 30° could also be described using an angle of 150°, the convention is that the normal orbit is prograde, an orbit in the same direction as the planet rotates. Inclinations greater than 90° describe retrograde orbits, thus, An inclination of 0° means the orbiting body has a prograde orbit in the planets equatorial plane. An inclination greater than 0° and less than 90° also describe prograde orbits, an inclination of 63. 4° is often called a critical inclination, when describing artificial satellites orbiting the Earth, because they have zero apogee drift. An inclination of exactly 90° is an orbit, in which the spacecraft passes over the north and south poles of the planet. An inclination greater than 90° and less than 180° is a retrograde orbit, an inclination of exactly 180° is a retrograde equatorial orbit. For gas giants, the orbits of moons tend to be aligned with the giant planets equator, the inclination of exoplanets or members of multiple stars is the angle of the plane of the orbit relative to the plane perpendicular to the line-of-sight from Earth to the object. An inclination of 0° is an orbit, meaning the plane of its orbit is parallel to the sky. An inclination of 90° is an orbit, meaning the plane of its orbit is perpendicular to the sky
12.
Longitude of the ascending node
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The longitude of the ascending node is one of the orbital elements used to specify the orbit of an object in space. It is the angle from a direction, called the origin of longitude, to the direction of the ascending node. The ascending node is the point where the orbit of the passes through the plane of reference. Commonly used reference planes and origins of longitude include, For a geocentric orbit, Earths equatorial plane as the plane. In this case, the longitude is called the right ascension of the ascending node. The angle is measured eastwards from the First Point of Aries to the node, for a heliocentric orbit, the ecliptic as the reference plane, and the First Point of Aries as the origin of longitude. The angle is measured counterclockwise from the First Point of Aries to the node, the angle is measured eastwards from north to the node. pp.40,72,137, chap. In the case of a star known only from visual observations, it is not possible to tell which node is ascending. In this case the orbital parameter which is recorded is the longitude of the node, Ω, here, n=<nx, ny, nz> is a vector pointing towards the ascending node. The reference plane is assumed to be the xy-plane, and the origin of longitude is taken to be the positive x-axis, K is the unit vector, which is the normal vector to the xy reference plane. For non-inclined orbits, Ω is undefined, for computation it is then, by convention, set equal to zero, that is, the ascending node is placed in the reference direction, which is equivalent to letting n point towards the positive x-axis. Kepler orbits Equinox Orbital node perturbation of the plane can cause revolution of the ascending node
13.
Argument of periapsis
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The argument of periapsis, symbolized as ω, is one of the orbital elements of an orbiting body. Parametrically, ω is the angle from the ascending node to its periapsis. For specific types of orbits, words such as perihelion, perigee, periastron, an argument of periapsis of 0° means that the orbiting body will be at its closest approach to the central body at the same moment that it crosses the plane of reference from South to North. An argument of periapsis of 90° means that the body will reach periapsis at its northmost distance from the plane of reference. Adding the argument of periapsis to the longitude of the ascending node gives the longitude of the periapsis, however, especially in discussions of binary stars and exoplanets, the terms longitude of periapsis or longitude of periastron are often used synonymously with argument of periapsis. In the case of equatorial orbits, the argument is strictly undefined, where, ex and ey are the x- and y-components of the eccentricity vector e. In the case of circular orbits it is assumed that the periapsis is placed at the ascending node. Kepler orbit Orbital mechanics Orbital node
14.
Mean anomaly
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In celestial mechanics, the mean anomaly is an angle used in calculating the position of a body in an elliptical orbit in the classical two-body problem. Define T as the time required for a body to complete one orbit. In time T, the radius vector sweeps out 2π radians or 360°. The average rate of sweep, n, is then n =2 π T or n =360 ∘ T, define τ as the time at which the body is at the pericenter. From the above definitions, a new quantity, M, the mean anomaly can be defined M = n, because the rate of increase, n, is a constant average, the mean anomaly increases uniformly from 0 to 2π radians or 0° to 360° during each orbit. It is equal to 0 when the body is at the pericenter, π radians at the apocenter, if the mean anomaly is known at any given instant, it can be calculated at any later instant by simply adding n δt where δt represents the time difference. Mean anomaly does not measure an angle between any physical objects and it is simply a convenient uniform measure of how far around its orbit a body has progressed since pericenter. The mean anomaly is one of three parameters that define a position along an orbit, the other two being the eccentric anomaly and the true anomaly. Define l as the longitude, the angular distance of the body from the same reference direction. Thus mean anomaly is also M = l − ϖ, mean angular motion can also be expressed, n = μ a 3, where μ is a gravitational parameter which varies with the masses of the objects, and a is the semi-major axis of the orbit. Mean anomaly can then be expanded, M = μ a 3, and here mean anomaly represents uniform angular motion on a circle of radius a
15.
Russian language
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Russian is an East Slavic language and an official language in Russia, Belarus, Kazakhstan, Kyrgyzstan and many minor or unrecognised territories. Russian belongs to the family of Indo-European languages and is one of the four living members of the East Slavic languages, written examples of Old East Slavonic are attested from the 10th century and beyond. It is the most geographically widespread language of Eurasia and the most widely spoken of the Slavic languages and it is also the largest native language in Europe, with 144 million native speakers in Russia, Ukraine and Belarus. Russian is the eighth most spoken language in the world by number of native speakers, the language is one of the six official languages of the United Nations. Russian is also the second most widespread language on the Internet after English, Russian distinguishes between consonant phonemes with palatal secondary articulation and those without, the so-called soft and hard sounds. This distinction is found between pairs of almost all consonants and is one of the most distinguishing features of the language, another important aspect is the reduction of unstressed vowels. Russian is a Slavic language of the Indo-European family and it is a lineal descendant of the language used in Kievan Rus. From the point of view of the language, its closest relatives are Ukrainian, Belarusian, and Rusyn. An East Slavic Old Novgorod dialect, although vanished during the 15th or 16th century, is considered to have played a significant role in the formation of modern Russian. In the 19th century, the language was often called Great Russian to distinguish it from Belarusian, then called White Russian and Ukrainian, however, the East Slavic forms have tended to be used exclusively in the various dialects that are experiencing a rapid decline. In some cases, both the East Slavic and the Church Slavonic forms are in use, with different meanings. For details, see Russian phonology and History of the Russian language and it is also regarded by the United States Intelligence Community as a hard target language, due to both its difficulty to master for English speakers and its critical role in American world policy. The standard form of Russian is generally regarded as the modern Russian literary language, mikhail Lomonosov first compiled a normalizing grammar book in 1755, in 1783 the Russian Academys first explanatory Russian dictionary appeared. By the mid-20th century, such dialects were forced out with the introduction of the education system that was established by the Soviet government. Despite the formalization of Standard Russian, some nonstandard dialectal features are observed in colloquial speech. Thus, the Russian language is the 6th largest in the world by number of speakers, after English, Mandarin, Hindi/Urdu, Spanish, Russian is one of the six official languages of the United Nations. Education in Russian is still a choice for both Russian as a second language and native speakers in Russia as well as many of the former Soviet republics. Russian is still seen as an important language for children to learn in most of the former Soviet republics, samuel P. Huntington wrote in the Clash of Civilizations, During the heyday of the Soviet Union, Russian was the lingua franca from Prague to Hanoi
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France
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France, officially the French Republic, is a country with territory in western Europe and several overseas regions and territories. The European, or metropolitan, area of France extends from the Mediterranean Sea to the English Channel and the North Sea, Overseas France include French Guiana on the South American continent and several island territories in the Atlantic, Pacific and Indian oceans. France spans 643,801 square kilometres and had a population of almost 67 million people as of January 2017. It is a unitary republic with the capital in Paris. Other major urban centres include Marseille, Lyon, Lille, Nice, Toulouse, during the Iron Age, what is now metropolitan France was inhabited by the Gauls, a Celtic people. The area was annexed in 51 BC by Rome, which held Gaul until 486, France emerged as a major European power in the Late Middle Ages, with its victory in the Hundred Years War strengthening state-building and political centralisation. During the Renaissance, French culture flourished and a colonial empire was established. The 16th century was dominated by civil wars between Catholics and Protestants. France became Europes dominant cultural, political, and military power under Louis XIV, in the 19th century Napoleon took power and established the First French Empire, whose subsequent Napoleonic Wars shaped the course of continental Europe. Following the collapse of the Empire, France endured a succession of governments culminating with the establishment of the French Third Republic in 1870. Following liberation in 1944, a Fourth Republic was established and later dissolved in the course of the Algerian War, the Fifth Republic, led by Charles de Gaulle, was formed in 1958 and remains to this day. Algeria and nearly all the colonies became independent in the 1960s with minimal controversy and typically retained close economic. France has long been a centre of art, science. It hosts Europes fourth-largest number of cultural UNESCO World Heritage Sites and receives around 83 million foreign tourists annually, France is a developed country with the worlds sixth-largest economy by nominal GDP and ninth-largest by purchasing power parity. In terms of household wealth, it ranks fourth in the world. France performs well in international rankings of education, health care, life expectancy, France remains a great power in the world, being one of the five permanent members of the United Nations Security Council with the power to veto and an official nuclear-weapon state. It is a member state of the European Union and the Eurozone. It is also a member of the Group of 7, North Atlantic Treaty Organization, Organisation for Economic Co-operation and Development, the World Trade Organization, originally applied to the whole Frankish Empire, the name France comes from the Latin Francia, or country of the Franks
17.
Czechoslovakia
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From 1939 to 1945, following its forced division and partial incorporation into Nazi Germany, the state did not de facto exist but its government-in-exile continued to operate. From 1948 to 1990, Czechoslovakia was part of the Soviet bloc with a command economy and its economic status was formalized in membership of Comecon from 1949, and its defense status in the Warsaw Pact of May 1955. A period of liberalization in 1968, known as the Prague Spring, was forcibly ended when the Soviet Union, assisted by several other Warsaw Pact countries. In 1993, Czechoslovakia split into the two states of the Czech Republic and Slovakia. Form of state 1918–1938, A democratic republic, 1938–1939, After annexation of Sudetenland by Nazi Germany in 1938, the region gradually turned into a state with loosened connections among the Czech, Slovak, and Ruthenian parts. A large strip of southern Slovakia and Carpatho-Ukraine was annexed by Hungary, 1939–1945, The region was split into the Protectorate of Bohemia and Moravia and the Slovak Republic. A government-in-exile continued to exist in London, supported by the United Kingdom, United States and its Allies, after the German invasion of Russia, Czechoslovakia adhered to the Declaration by United Nations and was a founding member of the United Nations. 1946–1948, The country was governed by a government with communist ministers, including the prime minister. Carpathian Ruthenia was ceded to the Soviet Union, 1948–1989, The country became a socialist state under Soviet domination with a centrally planned economy. In 1960, the country became a socialist republic, the Czechoslovak Socialist Republic. It was a state of the Soviet Union. 1989–1990, The federal republic consisted of the Czech Socialist Republic, 1990–1992, Following the Velvet Revolution, the state was renamed the Czech and Slovak Federal Republic, consisting of the Czech Republic and the Slovak Republic. Neighbours Austria 1918–1938, 1945–1992 Germany Hungary Poland Romania 1918–1938 Soviet Union 1945–1991 Ukraine 1991–1992 Topography The country was of irregular terrain. The western area was part of the north-central European uplands, the eastern region was composed of the northern reaches of the Carpathian Mountains and lands of the Danube River basin. Climate The weather is mild winters and mild summers, influenced by the Atlantic Ocean from the west, Baltic Sea from the north, and Mediterranean Sea from the south. The area was long a part of the Austro Hungarian Empire until the Empire collapsed at the end of World War I, the new state was founded by Tomáš Garrigue Masaryk, who served as its first president from 14 November 1918 to 14 December 1935. He was succeeded by his ally, Edvard Beneš. The roots of Czech nationalism go back to the 19th century, nationalism became a mass movement in the last half of the 19th century
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Hungary
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Hungary is a unitary parliamentary republic in Central Europe. With about 10 million inhabitants, Hungary is a member state of the European Union. The official language is Hungarian, which is the most widely spoken language in Europe. Hungarys capital and largest metropolis is Budapest, a significant economic hub, major urban areas include Debrecen, Szeged, Miskolc, Pécs and Győr. His great-grandson Stephen I ascended to the throne in 1000, converting the country to a Christian kingdom, by the 12th century, Hungary became a middle power within the Western world, reaching a golden age by the 15th century. Hungarys current borders were established in 1920 by the Treaty of Trianon after World War I, when the country lost 71% of its territory, 58% of its population, following the interwar period, Hungary joined the Axis Powers in World War II, suffering significant damage and casualties. Hungary became a state of the Soviet Union, which contributed to the establishment of a four-decade-long communist dictatorship. On 23 October 1989, Hungary became again a democratic parliamentary republic, in the 21st century, Hungary is a middle power and has the worlds 57th largest economy by nominal GDP, as well as the 58th largest by PPP, out of 188 countries measured by the IMF. As a substantial actor in several industrial and technological sectors, it is both the worlds 36th largest exporter and importer of goods, Hungary is a high-income economy with a very high standard of living. It keeps up a security and universal health care system. Hungary joined the European Union in 2004 and part of the Schengen Area since 2007, Hungary is a member of the United Nations, NATO, WTO, World Bank, the AIIB, the Council of Europe and Visegrád Group. Well known for its cultural history, Hungary has been contributed significantly to arts, music, literature, sports and science. Hungary is the 11th most popular country as a tourist destination in Europe and it is home to the largest thermal water cave system, the second largest thermal lake in the world, the largest lake in Central Europe, and the largest natural grasslands in Europe. The H in the name of Hungary is most likely due to historical associations with the Huns. The rest of the word comes from the Latinized form of Medieval Greek Oungroi, according to an explanation the Greek name was borrowed from Proto-Slavic Ǫgǔri, in turn borrowed from Oghur-Turkic Onogur. Onogur was the name for the tribes who later joined the Bulgar tribal confederacy that ruled the eastern parts of Hungary after the Avars. The Hungarians likely belonged to the Onogur tribal alliance and it is possible they became its ethnic majority. The Hungarian endonym is Magyarország, composed of magyar and ország, the word magyar is taken from the name of one of the seven major semi-nomadic Hungarian tribes, magyeri
19.
Poland
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Poland, officially the Republic of Poland, is a country in Central Europe, situated between the Baltic Sea in the north and two mountain ranges in the south. Bordered by Germany to the west, the Czech Republic and Slovakia to the south, Ukraine and Belarus to the east, the total area of Poland is 312,679 square kilometres, making it the 69th largest country in the world and the 9th largest in Europe. With a population of over 38.5 million people, Poland is the 34th most populous country in the world, the 8th most populous country in Europe, Poland is a unitary state divided into 16 administrative subdivisions, and its capital and largest city is Warsaw. Other metropolises include Kraków, Wrocław, Poznań, Gdańsk and Szczecin, the establishment of a Polish state can be traced back to 966, when Mieszko I, ruler of a territory roughly coextensive with that of present-day Poland, converted to Christianity. The Kingdom of Poland was founded in 1025, and in 1569 it cemented a political association with the Grand Duchy of Lithuania by signing the Union of Lublin. This union formed the Polish–Lithuanian Commonwealth, one of the largest and most populous countries of 16th and 17th century Europe, Poland regained its independence in 1918 at the end of World War I, reconstituting much of its historical territory as the Second Polish Republic. In September 1939, World War II started with the invasion of Poland by Nazi Germany, followed thereafter by invasion by the Soviet Union. More than six million Polish citizens died in the war, after the war, Polands borders were shifted westwards under the terms of the Potsdam Conference. With the backing of the Soviet Union, a communist puppet government was formed, and after a referendum in 1946. During the Revolutions of 1989 Polands Communist government was overthrown and Poland adopted a new constitution establishing itself as a democracy, informally called the Third Polish Republic. Since the early 1990s, when the transition to a primarily market-based economy began, Poland has achieved a high ranking on the Human Development Index. Poland is a country, which was categorised by the World Bank as having a high-income economy. Furthermore, it is visited by approximately 16 million tourists every year, Poland is the eighth largest economy in the European Union and was the 6th fastest growing economy on the continent between 2010 and 2015. According to the Global Peace Index for 2014, Poland is ranked 19th in the list of the safest countries in the world to live in. The origin of the name Poland derives from a West Slavic tribe of Polans that inhabited the Warta River basin of the historic Greater Poland region in the 8th century, the origin of the name Polanie itself derives from the western Slavic word pole. In some foreign languages such as Hungarian, Lithuanian, Persian and Turkish the exonym for Poland is Lechites, historians have postulated that throughout Late Antiquity, many distinct ethnic groups populated the regions of what is now Poland. The most famous archaeological find from the prehistory and protohistory of Poland is the Biskupin fortified settlement, dating from the Lusatian culture of the early Iron Age, the Slavic groups who would form Poland migrated to these areas in the second half of the 5th century AD. With the Baptism of Poland the Polish rulers accepted Christianity and the authority of the Roman Church
20.
Romania
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Romania is a sovereign state located in Southeastern Europe. It borders the Black Sea, Bulgaria, Ukraine, Hungary, Serbia and it has an area of 238,391 square kilometres and a temperate-continental climate. With over 19 million inhabitants, the country is the member state of the European Union. Its capital and largest city, Bucharest, is the sixth-largest city in the EU, the River Danube, Europes second-longest river, rises in Germany and flows in a general southeast direction for 2,857 km, coursing through ten countries before emptying into Romanias Danube Delta. The Carpathian Mountains, which cross Romania from the north to the southwest are marked by one of their tallest peaks, Moldoveanu, modern Romania was formed in 1859 through a personal union of the Danubian Principalities of Moldavia and Wallachia. The new state, officially named Romania since 1866, gained independence from the Ottoman Empire in 1877, at the end of World War I, Transylvania, Bukovina and Bessarabia united with the sovereign Kingdom of Romania. Romania lost several territories, of which Northern Transylvania was regained after the war, following the war, Romania became a socialist republic and member of the Warsaw Pact. After the 1989 Revolution, Romania began a transition back towards democracy and it has been a member of NATO since 2004, and part of the European Union since 2007. A strong majority of the population identify themselves as Eastern Orthodox Christians and are speakers of Romanian. The cultural history of Romania is often referred to when dealing with artists, musicians, inventors. For similar reasons, Romania has been the subject of notable tourist attractions, Romania derives from the Latin romanus, meaning citizen of Rome. The first known use of the appellation was attested in the 16th century by Italian humanists travelling in Transylvania, Moldavia, after the abolition of serfdom in 1746, the word rumân gradually fell out of use and the spelling stabilised to the form român. Tudor Vladimirescu, a leader of the early 19th century. The use of the name Romania to refer to the homeland of all Romanians—its modern-day meaning—was first documented in the early 19th century. The name has been officially in use since 11 December 1861, in English, the name of the country was formerly spelt Rumania or Roumania. Romania became the predominant spelling around 1975, Romania is also the official English-language spelling used by the Romanian government. The Neolithic-Age Cucuteni area in northeastern Romania was the region of the earliest European civilization. Evidence from this and other sites indicates that the Cucuteni-Trypillian culture extracted salt from salt-laden spring water through the process of briquetage
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Soviet Union
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The Soviet Union, officially the Union of Soviet Socialist Republics was a socialist state in Eurasia that existed from 1922 to 1991. It was nominally a union of national republics, but its government. The Soviet Union had its roots in the October Revolution of 1917 and this established the Russian Socialist Federative Soviet Republic and started the Russian Civil War between the revolutionary Reds and the counter-revolutionary Whites. In 1922, the communists were victorious, forming the Soviet Union with the unification of the Russian, Transcaucasian, Ukrainian, following Lenins death in 1924, a collective leadership and a brief power struggle, Joseph Stalin came to power in the mid-1920s. Stalin suppressed all opposition to his rule, committed the state ideology to Marxism–Leninism. As a result, the country underwent a period of rapid industrialization and collectivization which laid the foundation for its victory in World War II and postwar dominance of Eastern Europe. Shortly before World War II, Stalin signed the Molotov–Ribbentrop Pact agreeing to non-aggression with Nazi Germany, in June 1941, the Germans invaded the Soviet Union, opening the largest and bloodiest theater of war in history. Soviet war casualties accounted for the highest proportion of the conflict in the effort of acquiring the upper hand over Axis forces at battles such as Stalingrad. Soviet forces eventually captured Berlin in 1945, the territory overtaken by the Red Army became satellite states of the Eastern Bloc. The Cold War emerged by 1947 as the Soviet bloc confronted the Western states that united in the North Atlantic Treaty Organization in 1949. Following Stalins death in 1953, a period of political and economic liberalization, known as de-Stalinization and Khrushchevs Thaw, the country developed rapidly, as millions of peasants were moved into industrialized cities. The USSR took a lead in the Space Race with Sputnik 1, the first ever satellite, and Vostok 1. In the 1970s, there was a brief détente of relations with the United States, the war drained economic resources and was matched by an escalation of American military aid to Mujahideen fighters. In the mid-1980s, the last Soviet leader, Mikhail Gorbachev, sought to reform and liberalize the economy through his policies of glasnost. The goal was to preserve the Communist Party while reversing the economic stagnation, the Cold War ended during his tenure, and in 1989 Soviet satellite countries in Eastern Europe overthrew their respective communist regimes. This led to the rise of strong nationalist and separatist movements inside the USSR as well, in August 1991, a coup détat was attempted by Communist Party hardliners. It failed, with Russian President Boris Yeltsin playing a role in facing down the coup. On 25 December 1991, Gorbachev resigned and the twelve constituent republics emerged from the dissolution of the Soviet Union as independent post-Soviet states
22.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
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Siberia
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Siberia is an extensive geographical region, and by the broadest definition is also known as North Asia. Siberia has historically been a part of Russia since the 17th century, the territory of Siberia extends eastwards from the Ural Mountains to the watershed between the Pacific and Arctic drainage basins. It stretches southwards from the Arctic Ocean to the hills of north-central Kazakhstan and to the borders of Mongolia. With an area of 13.1 million square kilometres, Siberia accounts for 77% of Russias land area and this is equivalent to an average population density of about 3 inhabitants per square kilometre, making Siberia one of the most sparsely populated regions on Earth. If it were a country by itself, it would still be the largest country in area, the origin of the name is unknown. Some sources say that Siberia originates from the Siberian Tatar word for sleeping land, another account sees the name as the ancient tribal ethnonym of the Sirtya, a folk, which spoke a language that later evolved into the Ugric languages. This ethnic group was assimilated to the Siberian Tatar people. The modern usage of the name was recorded in the Russian language after the Empires conquest of the Siberian Khanate, a further variant claims that the region was named after the Xibe people. The Polish historian Chycliczkowski has proposed that the name derives from the word for north. He said that the neighbouring Chinese, Arabs and Mongolians would not have known Russian and he suggests that the name is a combination of two words, su and bir. The region is of significance, as it contains bodies of prehistoric animals from the Pleistocene Epoch. Specimens of Goldfuss cave lion cubs, Yuka and another woolly mammoth from Oymyakon, a rhinoceros from the Kolyma River. The Siberian Traps were formed by one of the largest known volcanic events of the last 500 million years of Earths geological history. They continued for a million years and are considered a cause of the Great Dying about 250 million years ago. At least three species of human lived in Southern Siberia around 40,000 years ago, H. sapiens, H. neanderthalensis, the last was determined in 2010, by DNA evidence, to be a new species. Siberia was inhabited by different groups of such as the Enets, the Nenets, the Huns, the Scythians. The Khan of Sibir in the vicinity of modern Tobolsk was known as a prominent figure who endorsed Kubrat as Khagan of Old Great Bulgaria in 630, the Mongols conquered a large part of this area early in the 13th century. With the breakup of the Golden Horde, the autonomous Khanate of Sibir was established in the late 15th century, turkic-speaking Yakut migrated north from the Lake Baikal region under pressure from the Mongol tribes during the 13th to 15th century
24.
Laboratory rat
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A laboratory rat is a rat of the species Rattus norvegicus which is bred and kept for scientific research. While less commonly used for research than mice, rats have served as an important animal model for research in psychology, laboratory rats share origins with their cousins in domestication, the fancy rats. In 18th century Europe, wild Brown rats ran rampant and this fueled the industry of rat-catching. Rat-catchers would not only make money by trapping the rodents, but also by selling them for food, or more commonly, rat-baiting was a popular sport which involved filling a pit with rats and timing how long it took for a terrier to kill them all. Over time, breeding the rats for these contests may have produced variations in color, notably the albino, the first time one of these albino mutants was brought into a laboratory for a study was in 1828, in an experiment on fasting. Over the next 30 years rats were used for several more experiments, the rat found early use in laboratory research in five areas, W. S. Small suggested that the rate of learning could be measured by rats in a maze, watson for his Ph. D. dissertation in 1903. The reproductive function of rats was studied at Institute for Experimental Biology at University of California, Berkeley by Herbert McLean Evans, the genetics of rats was studied by William Ernest Castle at the Bussey Institute of Harvard University until it closed in 1994. And rats have long used in cancer research, for instance at Crocker Institute for Cancer Research. The historical importance of species to scientific research is reflected by the amount of literature on it. Laboratory rats are frequently subject to dissection or microdialysis to study effects on organs. Laboratory rats not sacrificed may be euthanized or, in some cases, scientists have bred many strains or lines of rats specifically for experimentation. Most are derived from the albino Wistar rat, which is widely used. Other common strains are the Sprague Dawley, Fischer 344, Holtzman albino strains, the Long-Evans, as a result, many have been forced to study questions in mice that might be better pursued in rats. In October 2003, however, researchers succeeded in cloning two laboratory rats by nuclear transfer, so rats may begin to see more use as genetic research subjects. Much of the genome of Rattus norvegicus has been sequenced, a 1972 study compared neoplasms in “Sprague-Dawley” rats from six different commercial suppliers and found highly significant differences in the incidences of endocrine and mammary tumors. There were even significant variations in the incidences of adrenal medulla tumors among rats from the same source raised in different laboratories, all but one of the testicular tumors occurred in the rats from a single supplier. The researchers found that the incidence of tumors in Sprague-Dawley rats from different commercial sources varied as much each other as from the other strains of rats
25.
Drosophila melanogaster
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Drosophila melanogaster is a species of fly in the family Drosophilidae. The species is generally as the common fruit fly or vinegar fly. It is typically used because it is a species that is easy to care for, has four pairs of chromosomes, breeds quickly. D. melanogaster is a common pest in homes, restaurants, flies belonging to the family Tephritidae are also called fruit flies. This can cause confusion, especially in Australia and South Africa, the D. melanogaster lifespan is about 30 days at 29 °C. The developmental period for D. melanogaster varies with temperature, as with many ectothermic species, the shortest development time,7 days, is achieved at 28 °C. Development times increase at higher temperatures due to heat stress, under ideal conditions, the development time at 25 °C is 8.5 days, at 18 °C it takes 19 days and at 12 °C it takes over 50 days. Under crowded conditions, development time increases, while the emerging flies are smaller, females lay some 400 eggs, about five at a time, into rotting fruit or other suitable material such as decaying mushrooms and sap fluxes. The eggs, which are about 0.5 mm long, the resulting larvae grow for about 4 days while molting twice, at about 24 and 48 h after hatching. During this time, they feed on the microorganisms that decompose the fruit, the mother puts feces on the egg sacs to establish the same microbial composition in the larvaes guts which has worked positively for herself. Then the larvae encapsulate in the puparium and undergo a four-day-long metamorphosis, the female fruit fly prefers a shorter duration when it comes to sex. Males, on the hand, prefer it to last longer. Males perform a sequence of five behavioral patterns to court females, first, males orient themselves while playing a courtship song by horizontally extending and vibrating their wings. Soon after, the positions itself at the rear of the females abdomen in a low posture to tap. Finally, the male curls its abdomen and attempts copulation, females can reject males by moving away, kicking, and extruding their ovipositor. Copulation lasts around 15–20 minutes, during which males transfer a few hundred, females store the sperm in a tubular receptacle and in two mushroom-shaped spermathecae, sperm from multiple matings compete for fertilization. A last male precedence is believed to exist in which the last male to mate with a female sires about 80% of her offspring and this precedence was found to occur through both displacement and incapacitation. The displacement is attributed to sperm handling by the fly as multiple matings are conducted and is most significant during the first 1–2 days after copulation
26.
Fundulus heteroclitus
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The mummichog is a small killifish found along the Atlantic coast of the United States and Canada. Also known as Atlantic killifish, mummies, gudgeons, and mud minnows, the species is noted for its hardiness and ability to tolerate highly variable salinity, temperature fluctuations from 6 to 35 °C, very low oxygen levels, and heavily polluted ecosystems. As a result, the mummichog is a research subject in embryological, physiological. It is also the first fish sent to space, aboard Skylab in 1973. The genus name Fundulus comes from fundus, meaning bottom, from the habit of swimming near muddy bottoms. The species name heteroclitus means irregular or unusual, the type specimen was first described by Carl Linnaeus in 1766, from near Charleston, South Carolina. Other scientific names now considered synonyms for this species include Cobitis heteroclita, Fundulus fasciatus, Fundulus pisculentus, the mummichog belongs to the order Cyprinodontiformes, and the family Fundulidae. There are two subspecies, F. h. heteroclitus, in the south and F. h. macrolepidotus in the north, the name mummichog is derived from a Narragansett term which means going in crowds, which reflects the mummichogs strong shoaling tendency. Colloquial names include mummy, killie, salt water minnow, mud minnow, mud dabbler, marsh minnow, brackish water chub, gudgeon, the body of the mummichog is elongate but thick, with a deep caudal peduncle. Usual length is 7.5 to 9 cm but maximum lengths of 13 to 15 cm are possible, the mouth is upturned and the lower jaw protrudes when the mouth is closed. Pectoral and tail fins are round, mummichogs have 10-13 dorsal fin rays, 9-12 anal fin rays, 16-20 pectoral fin rays. Males have larger dorsal and anal fins than females, there is no lateral line on the body, but lateral line pores are present on the head. The colour is variable but is generally olive-brown or olive-green, there can be vertical bars on the sides that are thin, wavy, and silvery. Females tend to be paler, without bars or the yellow on the belly. Adults of the two subspecies can be distinguished based on morphological differences. And genomic Further, eggs of the subspecies have filaments that eggs of the southern subspecies lack. While the northern subspecies deposits eggs in the sand, the southern subspecies often deposits eggs inside empty mussel shells, the mummichog is very similar to the banded killifish, Fundulus diaphanus, and indeed the two species have been known to interbreed. The two species may overlap in their choice of habitat, but in general the banded killifish is more commonly found in freshwater, which is not the case for the mummichog
27.
1975 in spaceflight
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In 1975 several notable events happened in spaceflight such as the launch to Mars of the Viking orbiter/landers missions, the joint Apollo–Soyuz Test Project, and the Venera 9 Venus mission. Viking 1 was launched on 20 August 1975 and Viking 2 was launched 9 September 1975 and this orbiter/lander mission was to photograph Mars in detail and to find water and life on the surface. The Apollo-Soyuz saw an end to the race with the USA. The mission was launched between 15 July 1975 and 17 July 1975, the Venera 9 mission was launched 8 June 1975 was another successful orbiter/lander mission
28.
Soviet space dogs
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During the 1950s and 1960s the USSR used dogs for sub-orbital and orbital space flights to determine whether human spaceflight was feasible. In this period, the Soviet Union launched missions with passenger slots for at least 57 dogs, the number of dogs in space is smaller, as some dogs flew more than once. Most survived, the few that died were lost mostly through technical failures, a notable exception is Laika, the first dog to be sent into orbit, whose death was expected from the outset. Dogs were the animal for the experiments because scientists felt dogs were well suited to endure long periods of inactivity. As part of their training, they were confined in small boxes for 15–20 days at a time. Female dogs were used because of their temperament and because the suit the dogs wore in order to collect urine and feces was equipped with a special device, Dogs that flew in orbit were fed a nutritious jelly-like protein. This was highly fibrous, and assisted the dogs to excrete during long periods of time while in their small space module, more than 60% of dogs to enter space were reportedly suffering from constipation and gallstones on arrival back to base. Dogs were flown to an altitude of 100 km on board 15 scientific flights on R-1 rockets from 1951 to 1956, the dogs wore pressure suits with acrylic glass bubble helmets. From 1957 to 1960,11 flights with dogs were made on the R-2A series, three flights were made to an altitude of about 450 km on R-5A rockets in 1958. In the R-2 and R-5 rockets, the dogs were contained in a pressured cabin, Dezik and Tsygan were the first dogs to make a sub-orbital flight on 22 July 1951. Both dogs were recovered unharmed after travelling to an altitude of 110 km. Dezik made another flight in July 29,1951 with a dog named Lisa. After the death of Dezik, Tsygan was adopted as a pet by Soviet physicist Anatoli Blagonravov, Lisa and Ryzhik flew to an altitude of 100 km on 2 June 1954. Smelaya was due to make a flight in September but ran away the day before the launch and she was found the next day and went on to make a successful flight with a dog named Malyshka. Bolik ran away just days before his flight in September 1951, a replacement named ZIB, who was an untrained street dog found running around the barracks, was quickly located and made a successful flight. Otvazhnaya made a flight on 2 July 1959 along with a rabbit named Marfusha and she went on to make 5 other flights between 1959 and 1960. Albina and Tsyganka were both ejected out of their capsule at an altitude of 85 km and landed safely, albina was one of the dogs shortlisted for Sputnik 2, but never flew in orbit. Damka and Krasavka were to make a flight on 22 December 1960 as a part of the Vostok programme which also included mice
29.
Kosmos 936
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Bion 4 or Cosmos 936 was a Bion satellite. The mission involved nine countries, including the United States, in a series of biomedical research experiments, the experiments were primarily follow-ups to the Bion 3 flight. Scientists from the Bulgaria, Czechoslovakia, East Germany, France, Hungary, Poland, Romania, Soviet Union, the mission ended after 19.5 days. NSSDC ID 1977-074A Other Names Biocosmos 4 Cosmos 93610172 Launch Date/Time 1977-08-03 at 14,00,00 UTC On-orbit Dry Mass 4000 kg 1977 in spaceflight
30.
Kosmos 1514
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Bion 6 or Kosmos 1514 was a biomedical spaceflight research mission that was launched on December 12,1983. It was part of the Bion satellite program, two Rhesus monkeys were flown into orbit implanted with sensors to permit monitoring of carotid artery blood flow. Eighteen pregnant white rats were used for studies of the effects of microgravity, the rats subsequently produced normal litters. The mission ended after five days and this was the first time the Soviet space agency flew monkeys in Space, coming 34 years after the U. S. first put a monkey into space. The mission differed markedly from earlier Cosmos flights, both in terms of Soviet scientific goals and in the degree of cooperation required between the United States and the USSR. The two countries had to interact at a high level because much of the U. S. experiment hardware had to be integrated with the Soviet spacecraft, experiments focused on the effect of weightlessness on various physiological parameters. A study of circadian rhythms was concerned with the synchronization of primate motor activity, body temperature and skin temperature rhythms to a fixed light/dark cycle, blood pressure and flow were monitored, to evaluate short and long-term changes in these parameters. Changes in calcium metabolism were studied in order to determine the effect of weightlessness on the skeleton, the two rhesus monkeys flown onboard were about three years of age and each weighed approximately 4 kilograms. Height was a constraint in selecting animals for flight and this was because a Soviet vestibular experiment required that the flight restraint couches oscillate vertically within the animal capsules. The monkeys were conditioned to sit in the restraint couches and perform tasks for food rewards, tasks included pressing a lever with their feet and tracking a moving light with their eyes. Monkeys were also trained to eat and drink from food and juice dispensers, monkeys in the flight and control groups were implanted with blood pressure and flow cuffs and sensors to measure several physiological parameters. A neuroontogeny experiment was conducted to investigate space flight effects on the development of rats that spent part of their prenatal gestation period in space. Ten pregnant female Wistar rats were flown, ground control groups contained the same number of rats. At the start of the flight or control experiments, the rats were at gestation day 13 of their 21-day cycle. NSSDC ID 1983-121A Other Names Biocosmos 6 Cosmos 151414549 Launch Date/Time December 14,1983 at 07,00,00 UTC On-orbit Dry Mass 5700 kg 1983 in spaceflight Animals in space Cosmos 1514 NASA
31.
Kosmos 1667
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Kosmos 1667, or Bion No.7 was a biomedical research mission satellite involving scientists from nine countries. It was part of the Bion program and this mission was the scientific participation of nine countries. Although the U. S. experiment on the Kosmos 1667 mission was meant to be a repeat of the Kosmos 1514 cardiovascular experiment, modified post-surgery animal handling procedures minimised the risk of damaging the transducer implants. Data was sampled and recorded frequently during the inflight period. Two monkeys with flight-type cardiovascular instrumentation were studied in a ground-based Synchronous Control experiment, postural tilt tests were conducted during the pre-flight and post-flight periods in several animals to establish a ground-based pool of normal data for this procedure. This data was compared with the body fluid shifts thought to occur in flight. Instrument calibration procedures were modified on this mission to ensure that blood pressure measurements would be accurate, the main objective of American participation in the Kosmos 1667 mission was to measure carotid artery pressure and blood flow during the inflight period. The United States provided all flight and ground support instrumentation for this experiment, raw analogue data from flight and ground control experiments was transferred to the Cardiovascular Research Laboratory at the NASA Ames Research Center for analysis. Hemodynamic data was to be correlated with concurrently recorded Soviet data, a similar correlative study was performed during the Cosmos 1514 mission, where blood flow velocity was compared to total body cardiac output as determined by impedance cardiography. Two rhesus macaques named Gordyy and Oomka were flown onboard the biosatellite, each animal weighed approximately 8.8 pounds. Both were instrumented for Soviet neurophysiology studies, the instruments consisted of bilaterally implanted microelectrodes in the vestibular nuclei, and electro-oculogram and electroencephalogram electrodes. Monkeys were housed in Soviet BIOS capsules, as for the Kosmos 1514 mission, U. S. hardware developed for the Kosmos 1514 cardiovascular experiment was used again on this mission. A barometric pressure recorder mounted in the capsule was used to correct. They were also taken ten male rats, and ten newts, the newts had part of their front limbs amputated and their crystalline lenses removed to study the possible rate of human recovery from injuries incurred in space. A biocalorimeter monitored energy exchange during the emergence of flies from nymphs,1500 drosophila flies were carried for this purpose, the payload also included maize seeds, crocuses, and guppies in an aquarium. 1985 in spaceflight Animals in space NASA
32.
Bion-M No.1
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Bion-M No.1 is a Russian space mission, the part of the Bion series of space missions. The animal-carrying space capsule was launched into orbit on 19 April 2013, from Baikonur Cosmodrome, the Bion-M flew a 30-day mission. Return to Earth was on 19 May with a landing near Orenburg in Russia at 03,12 GMT, the satellite contains parts from two long standing Soviet spy satellite families. Bions landing unit is from the Zenit 2M satellite and the satellite also contains the instrument section of a Yantar and it was made by TsSKB Progress of Samara. The cargo consisted of 45 mice,15 geckos, eight Mongolian gerbils, snails, and fish. The animals were intended to survive the mission, but upon landing it was found that all gerbils, most of the 45 mice. Fifteen of the mice died when the dispenser in their experimental compartment stopped working. The gerbil compartment suffered a loss of power, ventilation, lighting. Ultimately, all of the animals will be euthanized for study. The Bion-M No.1 mission is managed by Roscosmos, but scientists from the United States, Germany, Canada, Poland and it was launched with 6 small satellites - OSSI-1, Dove-2, AIST2, BEESat 3, SOMP and BEESat 2. Research based on the animals has revealed insights into the impact of spaceflight on cerebral arteries, the spinal cord, inner ear. The arteries of the brain come under duress and their capacity is reduced by 40 percent, the reduced bloodflow may be key to triggering orthostatic intolerance
33.
Soyuz 17
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Soyuz 17 was the first of two long-duration missions to the Soviet Unions Salyut 4 space station in 1975. The flight set a Soviet mission-duration record of 29 days, surpassing the 23-day record set by the ill-fated Soyuz 11 crew aboard Salyut 1 in 1971. Gubarev manually docked Soyuz 17 to the station on 12 January, Salyut 4 was in an unusually high circular orbit of 350 km when Soyuz 17 docked with the station. Salyut designer Konstantin Feoktistov said this was to ensure propellant consumption would be half of what was needed for lower-altitude Salyuts, the crew worked between 15 and 20 hours a day, including their 2 1⁄2 hour exercise period. One of their activities included testing communication equipment for tracking ships, astrophysics was a major component of the mission, with the stations solar telescope activated on 16 January. The crew later discovered that the mirror of the telescope had been ruined by direct exposure to sunlight when the pointing system failed. They resurfaced the mirror on 3 February and worked out a way of pointing the telescope using a stethoscope, stopwatch, on 14 January, a ventilation hose was set up from Salyut 4 to keep the Soyuz ventilated while its systems were shut down. On 19 January it was announced that ion sensors were being used to orient the station, a new teleprinter was used for communications from the ground crew, freeing the Salyut crew from constant interruptions during their work. The cosmonauts began powering down the station on 7 February and they returned to Earth in the Soyuz capsule two days later and they safely landed near Tselinograd in a snowstorm with winds of 72 km/h and wore gravity suits to ease the effects of re-adaptation
