1.
Eclipse
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An eclipse occurs during a syzygy. The term eclipse is most often used to either a solar eclipse, when the Moons shadow crosses the Earths surface, or a lunar eclipse. A binary star system can also produce eclipses if the plane of the orbit of its constituent stars intersects the observers position, for any two objects in space, a line can be extended from the first through the second. The latter object will block some amount of light being emitted by the former, as viewed from such a location, this shadowing event is known as an eclipse. Typically the cross-section of the involved in an astronomical eclipse are roughly disk shaped. The region of an objects shadow during an eclipse is divided into three parts, The umbra, within which the object completely covers the light source, for the Sun, this light source is the photosphere. The antumbra, extending beyond the tip of the umbra, within which the object is completely in front of the light source, the penumbra, within which the object is only partially in front of the light source. A total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, during a lunar eclipse only the umbra and penumbra are applicable. This is because Earths apparent diameter from the viewpoint of the Moon is nearly four times that of the Sun, the same terms may be used analogously in describing other eclipses, e. g. the antumbra of Deimos crossing Mars, or Phobos entering Marss penumbra. For Earth, on average L is equal to 1. 384×106 km, hence the umbral cone of the Earth can completely envelop the Moon during a lunar eclipse. If the occulting object has an atmosphere, however, some of the luminosity of the star can be refracted into the volume of the umbra. This occurs, for example, during an eclipse of the Moon by the Earth—producing a faint, on Earth, the shadow cast during an eclipse moves very approximately at 1 km per sec. This depends on the location of the shadow on the Earth, http, //www. sciforums. com/threads/speed-of-eclipse-shadow. 53722/ An eclipse cycle takes place when a series of eclipses are separated by a certain interval of time. This happens when the orbital motions of the bodies form repeating harmonic patterns, a particular instance is the saros, which results in a repetition of a solar or lunar eclipse every 6,585.3 days, or a little over 18 years. Because this is not a number of days, successive eclipses will be visible from different parts of the world. An eclipse involving the Sun, Earth, and Moon can occur only when they are nearly in a line, allowing one to be hidden behind another. Because the orbital plane of the Moon is tilted with respect to the plane of the Earth. The Sun, Earth and nodes are aligned twice a year, there can be from four to seven eclipses in a calendar year, which repeat according to various eclipse cycles, such as a saros
2.
Religion in ancient Rome
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The Romans thought of themselves as highly religious, and attributed their success as a world power to their collective piety in maintaining good relations with the gods. According to legends, most of Romes religious institutions could be traced to its founders, particularly Numa Pompilius, the Sabine second king of Rome, who negotiated directly with the gods. This archaic religion was the foundation of the mos maiorum, the way of the ancestors or simply tradition, as Rome came into contact with foreign cultures, and conquered them, foreign religions increasingly attracted devotees among Romans, who increasingly had ancestry from elsewhere in the Empire. The emperors promoted the Imperial cult around the empire, and this, ultimately, Roman polytheism was brought to an end with the adoption of Christianity as the official religion of the empire. The priesthoods of public religion were held by members of the elite classes, there was no principle analogous to separation of church and state in ancient Rome. During the Roman Republic, the men who were elected public officials might also serve as augurs. Priests married, raised families, and led politically active lives, Julius Caesar became pontifex maximus before he was elected consul. The augurs read the will of the gods and supervised the marking of boundaries as a reflection of universal order, Roman religion was thus practical and contractual, based on the principle of do ut des, I give that you might give. Even the most skeptical among Romes intellectual elite such as Cicero, for ordinary Romans, religion was a part of daily life. Each home had a shrine at which prayers and libations to the familys domestic deities were offered. Neighborhood shrines and sacred such as springs and groves dotted the city. The Roman calendar was structured around religious observances, women, slaves, and children all participated in a range of religious activities. The Romans are known for the number of deities they honored. The Romans looked for common ground between their major gods and those of the Greeks, adapting Greek myths and iconography for Latin literature, etruscan religion was also a major influence, particularly on the practice of augury. The mysteries, however, involved exclusive oaths and secrecy, conditions that conservative Romans viewed with suspicion as characteristic of magic, conspiratorial, or subversive activity. Sporadic and sometimes brutal attempts were made to suppress religionists who seemed to threaten traditional morality and unity, one way that Rome incorporated diverse peoples was by supporting their religious heritage, building temples to local deities that framed their theology within the hierarchy of Roman religion. Inscriptions throughout the Empire record the worship of local and Roman deities. Because Romans had never been obligated to one god or one cult only
3.
Animal sacrifice
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Animal sacrifice is the ritual killing and offering of an animal to appease or maintain favour with a deity. Such forms of sacrifice are practised within many religions around the world, all or only part of a sacrificial animal may be offered, especially in the context of ritual slaughter. Animal sacrifices were common throughout Europe and the Ancient Near East until Late Antiquity, the Minoan settlement of Phaistos in ancient Crete reveals basins for animal sacrifice dating to the period 2000 to 1700 BC. The most common usages are animal sacrifice, zevah shelamim and olah, a qorban was an animal sacrifice, such as a bull, sheep, goat, deer or a dove that underwent shechita. Sacrifices could also consist grain, meal, wine, or incense, the Hebrew Bible says that Yahweh commanded the Israelites to offer offerings and sacrifices on various altars. The sacrifices were only to be offered by the hands of the Kohanim, before building the Temple in Jerusalem, when the Israelites were in the desert, sacrifices were offered only in the Tabernacle. After building Solomons Temple, sacrifices were allowed only there, after the Temple was destroyed, sacrifices was resumed when the Second Temple was built until it was also destroyed in 70 CE. After the destruction of the Second Temple sacrifices were prohibited because there was no longer a Temple, offering of sacrifices was briefly reinstated during the Jewish–Roman wars of the second century CE and was continued in certain communities thereafter. The Samaritans, a group related to the Jews, practice animal sacrifice in accordance with the Law of Moses. References to animal sacrifice appear in the New Testament, such as the parents of Jesus sacrificing two doves and the Apostle Paul performing a Nazirite vow even after the death of Christ. Christ is referred to by his apostles as the Lamb of God, some villages in Greece sacrifice animals to Orthodox saints in a practice known as kourbania. Sacrifice of a lamb, or less commonly a rooster, is a practice in Armenian Church. This tradition, called matagh, is believed to stem from pre-Christian pagan rituals, Animal sacrifice was instituted in the Church of Jesus Christ of Latter Day Saints, a minor Latter Day Saint faction founded by James J. Strang in 1844. Strangs Book of the Law of the Lord deals with the topic of animal sacrifice in chapters 7 and 40, given the prohibition on sacrifices for sin contained in III Nephi 9, 19-20, Strang did not require sin offerings. Rather, he focused on sacrifice as an element of religious celebrations, especially the commemoration of his own coronation as king over his church, which occurred on July 8,1850. The head of house, from the king to his lowest subject, was to offer a heifer, or a lamb. Every man a clean beast, or a clean fowl, according to his household, while the killing of sacrifices was a prerogative of Strangite priests, female priests were specifically barred from participating in this aspect of the priestly office. Firstfruits offerings were also demanded of all Strangite agricultural harvests, Animal sacrifices are no longer practiced by the Strangite organization, though belief in their correctness is still required
4.
Glossary of ancient Roman religion
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The vocabulary of ancient Roman religion was highly specialized. Its study affords important information about the religion, traditions and beliefs of the ancient Romans and this legacy is conspicuous in European cultural history in its influence on later juridical and religious vocabulary in Europe, particularly of the Western Church. For theonyms, or the names and epithets of gods, see List of Roman deities, for public religious holidays, see Roman festivals. For temples see the List of Ancient Roman temples, individual landmarks of religious topography in ancient Rome are not included in this list, see Roman temple. The verb abominari was a term of augury for an action that rejects or averts an unfavourable omen indicated by a signum, the noun is abominatio, from which English abomination derives. At the taking of formally solicited auspices, the observer was required to acknowledge any potentially bad sign occurring within the templum he was observing, regardless of the interpretation. He might, however, take actions in order to ignore the signa, including avoiding the sight of them. The latter tactic required promptness, wit and skill based on discipline, thus the omen had no validity apart from the observation of it. The aedes was the place of a god. It was thus a structure that housed the image, distinguished from the templum or sacred district. Aedes is one of several Latin words that can be translated as shrine or temple, for instance, the Temple of Vesta, as it is called in English, was in Latin an aedes. See also the diminutive aedicula, a small shrine, in his work On Architecture, Vitruvius always uses the word templum in the technical sense of a space defined through augury, with aedes the usual word for the building itself. The design of an aedes, he writes, should be appropriate to the characteristics of the deity. Thus in theory, though not always in practice, architectural aesthetics had a theological dimension, the word aedilis, a public official, is related by etymology, among the duties of the aediles was the overseeing of public works, including the building and maintenance of temples. The temple of Flora, for instance, was built in 241 BC by two aediles acting on Sibylline oracles, the plebeian aediles had their headquarters at the aedes of Ceres. In religious usage, ager was terrestrial space defined for the purposes of augury in relation to auspicia, there were five kinds of ager, Romanus, Gabinus, peregrinus, hosticus and incertus. The ager Romanus originally included the space outside the pomerium. According to Varro, the ager Gabinus pertained to the circumstances of the oppidum of Gabii
5.
Cicero
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Marcus Tullius Cicero was a Roman philosopher, politician, lawyer, orator, political theorist, consul, and constitutionalist. He came from a wealthy family of the Roman equestrian order. According to Michael Grant, the influence of Cicero upon the history of European literature, Cicero introduced the Romans to the chief schools of Greek philosophy and created a Latin philosophical vocabulary distinguishing himself as a translator and philosopher. Though he was an orator and successful lawyer, Cicero believed his political career was his most important achievement. During the chaotic latter half of the 1st century BC marked by civil wars, following Julius Caesars death, Cicero became an enemy of Mark Antony in the ensuing power struggle, attacking him in a series of speeches. His severed hands and head were then, as a revenge of Mark Antony. Petrarchs rediscovery of Ciceros letters is often credited for initiating the 14th-century Renaissance in public affairs, humanism, according to Polish historian Tadeusz Zieliński, the Renaissance was above all things a revival of Cicero, and only after him and through him of the rest of Classical antiquity. Cicero was born in 106 BC in Arpinum, a hill town 100 kilometers southeast of Rome and his father was a well-to-do member of the equestrian order and possessed good connections in Rome. However, being a semi-invalid, he could not enter public life, although little is known about Ciceros mother, Helvia, it was common for the wives of important Roman citizens to be responsible for the management of the household. Ciceros brother Quintus wrote in a letter that she was a thrifty housewife, Ciceros cognomen, or personal surname, comes from the Latin for chickpea, cicer. Plutarch explains that the name was given to one of Ciceros ancestors who had a cleft in the tip of his nose resembling a chickpea. However, it is likely that Ciceros ancestors prospered through the cultivation. Romans often chose down-to-earth personal surnames, the family names of Fabius, Lentulus, and Piso come from the Latin names of beans, lentils. Plutarch writes that Cicero was urged to change this name when he entered politics. During this period in Roman history, cultured meant being able to speak both Latin and Greek, Cicero used his knowledge of Greek to translate many of the theoretical concepts of Greek philosophy into Latin, thus translating Greek philosophical works for a larger audience. It was precisely his broad education that tied him to the traditional Roman elite, according to Plutarch, Cicero was an extremely talented student, whose learning attracted attention from all over Rome, affording him the opportunity to study Roman law under Quintus Mucius Scaevola. Ciceros fellow students were Gaius Marius Minor, Servius Sulpicius Rufus, the latter two became Ciceros friends for life, and Pomponius would become, in Ciceros own words, as a second brother, with both maintaining a lifelong correspondence. Cicero wanted to pursue a career in politics along the steps of the Cursus honorum
6.
Caligula
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Caligula, properly Gaius Julius Caesar Augustus Germanicus was Roman emperor from AD 37–41. Born Gaius Julius Caesar Germanicus, Caligula was a member of the house of rulers known as the Julio-Claudian dynasty. Caligulas biological father was Germanicus, and he was the great-nephew, the young Gaius earned the nickname Caligula from his fathers soldiers while accompanying him during his campaigns in Germania. When Germanicus died at Antioch in AD19, his wife Agrippina the Elder returned with her six children to Rome, the conflict eventually led to the destruction of her family, with Caligula as the sole male survivor. Untouched by the intrigues, Caligula accepted the invitation to join the Emperor in AD31 on the island of Capri. With the death of Tiberius in AD37, Caligula succeeded his grand uncle, there are few surviving sources about the reign of Emperor Caligula, although he is described as a noble and moderate ruler during the first six months of his reign. After this, the focus upon his cruelty, sadism, extravagance. He directed much of his attention to construction projects and luxurious dwellings for himself. During his reign, the empire annexed the Kingdom of Mauretania as a province, in early AD41, Caligula was assassinated as a result of a conspiracy by officers of the Praetorian Guard, senators, and courtiers. Gaius Julius Caesar was born in Antium on 31 August 12 AD, Gaius had two older brothers, Nero and Drusus, as well as three younger sisters, Agrippina the Younger, Julia Drusilla and Julia Livilla. He was also a nephew of Claudius, Germanicus younger brother, Agrippina the Elder was the daughter of Marcus Vipsanius Agrippa and Julia the Elder. She was a granddaughter of Augustus and Scribonia on her mothers side, through Agrippina, Augustus was the maternal great-grandfather of Gaius. As a boy of just two or three, Gaius accompanied his father, Germanicus, on campaigns in the north of Germania, the soldiers were amused that Gaius was dressed in a miniature soldiers outfit, including boots and armour. He was soon given his nickname Caligula, meaning little boot in Latin, Gaius, though, reportedly grew to dislike this nickname. Suetonius claims that Germanicus was poisoned in Syria by an agent of Tiberius, after the death of his father, Caligula lived with his mother until her relations with Tiberius deteriorated. Tiberius would not allow Agrippina to remarry for fear her husband would be a rival, Agrippina and Caligulas brother, Nero, were banished in 29 AD on charges of treason. The adolescent Caligula was then sent to live with his great-grandmother Livia, after her death, he was sent to live with his grandmother Antonia. In 30 AD, his brother, Drusus Caesar, was imprisoned on charges of treason, Suetonius writes that after the banishment of his mother and brothers, Caligula and his sisters were nothing more than prisoners of Tiberius under the close watch of soldiers
7.
Jupiter (mythology)
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Jupiter, also Jove, is the god of sky and thunder and king of the gods in Ancient Roman religion and mythology. Jupiter was the deity of Roman state religion throughout the Republican and Imperial eras. In Roman mythology, he negotiates with Numa Pompilius, the king of Rome, to establish principles of Roman religion such as offering. Jupiter is usually thought to have originated as a sky god, the two emblems were often combined to represent the god in the form of an eagle holding in its claws a thunderbolt, frequently seen on Greek and Roman coins. As the sky-god, he was a witness to oaths. Many of his functions were focused on the Capitoline Hill, where the citadel was located and he was the chief deity of the early Capitoline Triad with Mars and Quirinus. In the later Capitoline Triad, he was the guardian of the state with Juno. His sacred tree was the oak, the Romans regarded Jupiter as the equivalent of the Greek Zeus, and in Latin literature and Roman art, the myths and iconography of Zeus are adapted under the name Iuppiter. In the Greek-influenced tradition, Jupiter was the brother of Neptune, each presided over one of the three realms of the universe, sky, the waters, and the underworld. The Italic Diespiter was also a sky god who manifested himself in the daylight, usually, Tinia is usually regarded as his Etruscan counterpart. The Romans believed that Jupiter granted them supremacy because they had honoured him more than any other people had, Jupiter was the fount of the auspices upon which the relationship of the city with the gods rested. He personified the divine authority of Romes highest offices, internal organization and his image in the Republican and Imperial Capitol bore regalia associated with Romes ancient kings and the highest consular and Imperial honours. The consuls swore their oath of office in Jupiters name, to thank him for his help, they offered him a white ox with gilded horns. A similar offering was made by generals, who surrendered the tokens of their victory at the feet of Jupiters statue in the Capitol. Some scholars have viewed the triumphator as embodying Jupiter in the triumphal procession, Jupiters association with kingship and sovereignty was reinterpreted as Romes form of government changed. Originally, Rome was ruled by kings, after the monarchy was abolished and the Republic established, religious prerogatives were transferred to the patres, nostalgia for the kingship was considered treasonous. Those suspected of harbouring monarchical ambitions were punished, regardless of their service to the state, in the 5th century BC, the triumphator Camillus was sent into exile after he drove a chariot with a team of four white horses —an honour reserved for Jupiter himself. His house on the Capitoline Hill was razed, and it was decreed that no patrician should ever be allowed to live there, during the Conflict of the Orders, Romes plebeians demanded the right to hold political and religious office
8.
Halley's Comet
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Halleys Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is visible to the naked eye from Earth. Halley last appeared in the parts of the Solar System in 1986. Halleys returns to the inner Solar System have been observed and recorded by astronomers since at least 240 BC, clear records of the comets appearances were made by Chinese, Babylonian, and medieval European chroniclers, but were not recognized as reappearances of the same object at the time. The comets periodicity was first determined in 1705 by English astronomer Edmond Halley, Comet Halley is commonly pronounced /ˈhæli/, rhyming with valley, or /ˈheɪli/, rhyming with daily. Spellings of Edmond Halleys name during his lifetime included Hailey, Haley, Hayley, Halley, Hawley, Halley was the first comet to be recognized as periodic. Until the Renaissance, the consensus on the nature of comets. This idea was disproved in 1577 by Tycho Brahe, who used parallax measurements to show that comets must lie beyond the Moon, many were still unconvinced that comets orbited the Sun, and assumed instead that they must follow straight paths through the Solar System. In 1687, Sir Isaac Newton published his Philosophiæ Naturalis Principia Mathematica, in which he outlined his laws of gravity and his work on comets was decidedly incomplete. Halley thus concluded that all three comets were, in fact, the same object returning every 76 years, a period that has since been amended to every 75–76 years. After a rough estimate of the perturbations the comet would sustain from the attraction of the planets. Halley died in 1742 before he could observe this himself, Halleys prediction of the comets return proved to be correct, although it was not seen until 25 December 1758, by Johann Georg Palitzsch, a German farmer and amateur astronomer. It did not pass through its perihelion until 13 March 1759 and this effect was computed prior to its return by a team of three French mathematicians, Alexis Clairaut, Joseph Lalande, and Nicole-Reine Lepaute. The confirmation of the return was the first time anything other than planets had been shown to orbit the Sun. It was also one of the earliest successful tests of Newtonian physics, the comet was first named in Halleys honour by French astronomer Nicolas Louis de Lacaille in 1759. Some scholars have proposed that first-century Mesopotamian astronomers already had recognized Halleys Comet as periodic and this theory notes a passage in the Bavli Talmud that refers to a star which appears once in seventy years that makes the captains of the ships err. It was necessary to use ancient Chinese comet observations to constrain their calculations, Halleys orbital period over the last 3 centuries has been between 75–76 years, although it has varied between 74–79 years since 240 BC. Its orbit around the Sun is highly elliptical, with an eccentricity of 0.967
9.
National Geographic
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National Geographic is the official magazine of the National Geographic Society. It has been published continuously since its first issue in 1888 and it primarily contains articles about science, geography, history, and world culture. The magazine is known for its thick square-bound glossy format with a rectangular border. The magazine is published monthly, and additional map supplements are also included with subscriptions and it is available in a traditional printed edition and through an interactive online edition. On occasion, special editions of the magazine are issued and this includes a US circulation of 3.5 million. From the 1970s through about 2010 the magazine was printed in Corinth, Mississippi, the current Editor-in-Chief of the National Geographic Magazine is Susan Goldberg. Goldberg is also Editorial Director for National Geographic Partners, overseeing the print and she is responsible for News, Books, National Geographic Traveler magazine, National Geographic History magazine, Maps, and all digital content with the exception of National Geographic Kids. Goldberg reports to Declan Moore, CEO of National Geographic Partners, the first issue of National Geographic Magazine was published on September 22,1888, nine months after the Society was founded. The June 1985 cover portrait of the presumed to be 12-year-old Afghan girl Sharbat Gula, shot by photographer Steve McCurry, in the late 1990s, the magazine began publishing The Complete National Geographic, a digital compilation of all the past issues of the magazine. It was then sued over copyright of the magazine as a work in Greenberg v. National Geographic and other cases. The magazine eventually prevailed in the dispute, and in July 2009 it resumed publishing a compilation containing all issues through December 2008. The compilation was updated to make more recent issues available. National Geographic Kids, the version of the magazine, was launched in 1975 under the name National Geographic World. The January 2017 issue of National Geographic has a nine-year-old transgender girl on the cover, the magazine printed articles on Berlin, de-occupied Austria, the Soviet Union, and Communist China that deliberately downplayed politics to focus on culture. In its coverage of the Space Race, National Geographic focused on the scientific achievement while largely avoiding reference to the connection to nuclear arms buildup. There were also articles in the 1930s, 40s and 50s about the individual states and their resources. Many of these articles were written by longtime staff such as Frederick Simpich, there were also articles about biology and science topics. In later years articles became outspoken on issues such as issues, deforestation, chemical pollution, global warming
10.
Comet
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A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to evolve gasses, a process called outgassing. This produces an atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of radiation and the solar wind acting upon the nucleus of the comet. Comet nuclei range from a few hundred metres to tens of kilometres across and are composed of collections of ice, dust. The coma may be up to 15 times the Earths diameter, if sufficiently bright, a comet may be seen from the Earth without the aid of a telescope and may subtend an arc of 30° across the sky. Comets have been observed and recorded since ancient times by many cultures, Comets usually have highly eccentric elliptical orbits, and they have a wide range of orbital periods, ranging from several years to potentially several millions of years. Short-period comets originate in the Kuiper belt or its associated scattered disc, long-period comets are thought to originate in the Oort cloud, a spherical cloud of icy bodies extending from outside the Kuiper belt to halfway to the nearest star. Long-period comets are set in motion towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars, hyperbolic comets may pass once through the inner Solar System before being flung to interstellar space. The appearance of a comet is called an apparition, Comets are distinguished from asteroids by the presence of an extended, gravitationally unbound atmosphere surrounding their central nucleus. This atmosphere has parts termed the coma and the tail, however, extinct comets that have passed close to the Sun many times have lost nearly all of their volatile ices and dust and may come to resemble small asteroids. Asteroids are thought to have a different origin from comets, having formed inside the orbit of Jupiter rather than in the outer Solar System, the discovery of main-belt comets and active centaur minor planets has blurred the distinction between asteroids and comets. As of November 2014 there are 5,253 known comets, however, this represents only a tiny fraction of the total potential comet population, as the reservoir of comet-like bodies in the outer Solar System is estimated to be one trillion. Roughly one comet per year is visible to the eye, though many of those are faint. Particularly bright examples are called Great Comets, the word comet derives from the Old English cometa from the Latin comēta or comētēs. That, in turn, is a latinisation of the Greek κομήτης, Κομήτης was derived from κομᾶν, which was itself derived from κόμη and was used to mean the tail of a comet. The astronomical symbol for comets is ☄, consisting of a disc with three hairlike extensions. The solid, core structure of a comet is known as the nucleus, cometary nuclei are composed of an amalgamation of rock, dust, water ice, and frozen gases such as carbon dioxide, carbon monoxide, methane, and ammonia. As such, they are described as dirty snowballs after Fred Whipples model
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