When the object enters the atmosphere, various factors like friction and chemical interactions with the atmospheric gases cause it to heat up and radiate that energy. It becomes a meteor and forms a fireball, known as a shooting/falling star, meteorites that survive atmospheric entry and impact vary greatly in size. For geologists, a bolide is a large enough to create a crater. Meteorites that are recovered after being observed as they transit the atmosphere or impact the Earth are called meteorite falls, all others are known as meteorite finds. As of April 2016, there were about 1,140 witnessed falls that have specimens in the worlds collections, there are more than 38,660 well-documented meteorite finds. Modern classification schemes divide meteorites into groups according to their structure and isotopic composition, meteorites smaller than 2 mm are classified as micrometeorites. Extraterrestrial meteorites are such objects that have impacted other celestial bodies and they have been found on the Moon and Mars.
Meteorites are always named for the places they were found, usually a town or geographic feature. In cases where many meteorites were found in one place, the name may be followed by a number or letter, the name designated by the Meteoritical Society is used by scientists and most collectors. Most meteoroids disintegrate when entering the Earths atmosphere, five to ten a year are observed to fall and are subsequently recovered and made known to scientists. Few meteorites are large enough to create large impact craters, they typically arrive at the surface at their terminal velocity and, at most, create a small pit. Large meteoroids may strike the ground with a significant fraction of their escape velocity, the kind of crater will depend on the size, degree of fragmentation, and incoming angle of the impactor. The force of such collisions has the potential to cause widespread destruction, the most frequent hypervelocity cratering events on the Earth are caused by iron meteoroids, which are most easily able to transit the atmosphere intact.
In contrast, even relatively large stony or icy bodies like small comets or asteroids, up to millions of tons, are disrupted in the atmosphere, and do not make impact craters. Although such disruption events are uncommon, they can cause a concussion to occur. Very large stony objects, hundreds of meters in diameter or more, weighing tens of millions of tons or more, can reach the surface and cause large craters, such events are generally so energetic that the impactor is completely destroyed, leaving no meteorites. Several phenomena are well documented during witnessed meteorite falls too small to produce hypervelocity craters, various colors have been reported, including yellow and red. Flashes and bursts of light can occur as the object breaks up, explosions and rumblings are often heard during meteorite falls, which can be caused by sonic booms as well as shock waves resulting from major fragmentation events
Hassagers Kollegium is a small dormitory located at Frederiksberg Bredegade 13 B2000 Frederiksberg, Denmark. The name simply means Hassagers dormitory and it has 10 small single rooms which may only be rented by students from the University of Copenhagen who have passed exams equivalent to two years of study. Through the years, about 340 students have lived at the Kollegium, the mix of students from the different faculties and the fact that only older students are admitted have created a dormitory with a relatively calm atmosphere. The Kollegium was founded by Dorthea Hassager in remembrance of her husband, the priest Carl Hassager. It is the youngest of the old dormitories of the University of Copenhagen, the current ephorus is John Edelsgaard Andersen, PhD who is the director of the International Office of the University of Copenhagen. Only a person who works at the university may become ephorus, the title ephorus is derived from the Greek ephoros which has been vulgarized into Latin The dormitory has a janitor who takes care of the more practical aspects of managing the dorm.
After the Second World War Hassagers Kollegium became integrated into the newly built 4, the old dormitory was torn down, and Hassagers Kollegium now shares building and ephorus with the new dormitory. The traditions of Hassagers Collegium live on and application for the two dormitories remains separate, joint homepage of Hassagers Kollegium and 4
North Campus (University of Copenhagen)
The North Campus is one of the University of Copenhagens four campuses in Copenhagen, Denmark. It is situated just north of the city centre, across from Copenhagens largest park, Fælledparken and it is home to the Faculty of Science and the Faculty of Health and Medical Sciences. The North Campus is home to two of the University of Copenhagens six faculties, the Faculty of Science and the Faculty of Health, the Faculty of Sciences main area is University Park, a triangle-shaped area located between Jagtvej, Tagensvej and Nørre Allé. A street divides the area into northern and southern sections, the Faculty of Health and Medical Sciences main area is the Panum Building, which is located south of the University Park and across the street from Rigshospitalet. It is the Faculty of Health and Medical Sciences largest building complex, between the Panum building complex and the University Park is the Faculty Library of Natural and Health Sciences, which is part of the Royal Library and shared by both faculties.
The North Campus has buildings, such as the Teilum Building, the Niels Bohr Institute. The University Park is an area located in Nørrebro that is bordered by Jagtvej, Tagensvej. The area has been subject to the state since 1898 and contains a number of buildings associated with the University of Copenhagen. The area forms a part of the North Campus and will therefore be subject to a number of changes until 2020. The University Park is bisected by Lersø Parkallé, the area is historically part of Serridslev, which in 1525/1527 was given by the King and the bishop of Roskilde to Copenhagen and became Nørre Fælled. The part of Nørre Fælled which today constitutes University Park was given to the state by Copenhagen in an 1898 agreement, the agreement dealt with the Rigshospitalet and Østerfælled Barracks areas. The first settlement in the area was the Copenhagen Military Hospital along todays Tagensvej, the vision for the University Park area was the brainchild of architect Kaj Gottlob in 1930, with buildings along Nørre Allé and Jagtvej encircling a central green area.
The August Krogh Building is a building that is used by the Department of Biology and it is named after August Krogh, who contributed a number of fundamental discoveries within several fields of physiology, and is famous for developing the Krogh Principle. The building is located near the Department of Computer Science, the Hans Christian Ørsted Institute is a building complex that houses the departments of mathematics and chemistry, as well as part of the Niels Bohr Institute. It is named after the physicist Hans Christian Ørsted, who discovered electromagnetism and was the first to isolate aluminium, the complex is made up of five connected buildings, A, B, C, D and E. Building A is a connecting building, it has ground, first floor and basement level. Building B is a five floor building, and holds facilities for inorganic and organic chemistry, in the basement of the building is a mass spectrometry apparatus. Building C is a five floor building similar to building B and holds the sections for theoretical chemistry, Building D is a five floor building similar to B and C, but this is dedicated to physics and is as such part of the Niels Bohr Institute
University of Copenhagen Faculty of Science
The Faculty of Science at the University of Copenhagen houses 12 departments, including the Natural History Museum of Denmark. The facultys administration is housed at the universitys Frederiksberg Campus, the faculty offers three-year Bachelor of Science, two-year Master of Science and a three-year Ph. D. degree programmes. There are two areas of study programmes. The other is the natural history-geography group, which includes biology, physical education, sports science, geography, the University was co-founder of the Euroleague for Life Sciences which was established in 2001. In January 2005, the August Krogh Institute and the Department of Molecular Biology merged to form the Department of Molecular Biology and Physiology, three years it was merged into the Department of Biology. In January 2007, the Royal Veterinary and Agricultural University was merged into the University of Copenhagen and was renamed as the Faculty of Life Sciences. Five years it was split up, with the veterinary part merging into the Faculty of Health and Medical Sciences, the seal of the faculty contains the following text which is written in a circle around a stylized rendering of a hafnium atom.
Hafnium was discovered at the Faculty in 1923 by Dirk Coster and Georg von Hevesy, the faculty’s research and teaching takes place across 12 departments. Some departments house specialized sections and laboratories
University of Copenhagen Zoological Museum
The Copenhagen Zoological Museum is a part of the Natural History Museum of Denmark which consist of four natural science museums. The permanent exhibition From pole to pole show animals from around the world in big displays, there is a semi-permanent Darwin exhibition and a full collection of all the animals in the Danish territory, including Greenland. The history of the Zoological Museum, University of Copenhagen, series of pictures from the museum
Cape York meteorite
The Cape York meteorite is named for Cape York, near the location of its discovery in Savissivik, Meteorite Island, and is one of the largest iron meteorites in the world. The meteorite collided with Earth nearly 10,000 years ago, the iron masses were known to Inuit as Ahnighito, weighing 31 metric tons, the Woman, weighing 3 metric tons, and the Dog, weighing 400 kilograms. For centuries, Inuit living near the meteorites used them as a source of metal for tools, the Inuit would work the metal using cold forging—that is, by stamping and hammering it. The first stories of its existence reached scientific circles in 1818, five expeditions between 1818 and 1883 failed to find the source of the iron. It was located in 1894 by Robert E. Peary, the famous American Navy Arctic explorer, Peary enlisted the help of a local Inuit guide, who brought him to Saviksoah Island, just off northern Greenlands Cape York in 1894. It took Peary three years to arrange and carry out the loading of the iron meteorites onto ships.
It required the building of Greenlands only railroad, Peary sold the pieces for $40,000 to the American Museum of Natural History in New York City where they are still on display. Today the 3.4 m x 2.1 m x 1.7 m piece named Ahnighito is open for viewing at the American Museum of Natural History in the Arthur Ross Hall and it is the heaviest meteorite that has ever been relocated. It is so heavy that it was necessary to build its display stand so that the supports reached directly to the bedrock below the museum, in 1963, a fourth major piece of the Cape York meteorite was discovered by Vagn F. Buchwald on Agpalilik peninsula. The Agpalilik meteorite, known as the Man, weighs about 20 metric tons, there are abundant elongated troilite nodules. The troilite nodules contain inclusions of chromite, phosphates, the rare nitride mineral carlsbergite occurs within the matrix of the metal phase. Graphite was not observed and the isotopes are in disequilibrium. Glossary of meteoritics History of ferrous metallurgy Archaeometallurgy Inuit culture Patricia A. M.
Huntington, Robert E Peary and the Cape York meteorites American Museum of Natural History www. meteoritestudies. com Cape York on the Meteoritical Bulletin Database