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Karoonda Meteorite
__NOTOC__ The Karoonda meteorite is a meteorite that fell to earth on 25 November 1930 at 10:53 pm near the South Australian town of Karoonda. It is of a rare composition, being carbonaceous chondrite, and is also rare in that it was found so soon after its landing. Several fragments are now held in the South Australian Museum in Adelaide. The fall and discovery On 25 November 1930, the meteorite was seen falling through the sky from the Eyre Peninsula in the west to the middle of Victoria in the east. Adelaide residents reported a "huge ball of fire with a flaming tail" shooting across the eastern sky. Some reported that the colour of the flames changed from brilliant red, to pale blue to sickly yellow. Other witnesses recalled its effect as "turning light into day". Witnesses closer to Karoonda reported that a loud detonation followed by a low rumbling like thunder was heard shortly after the meteorite passed overhead. It landed at 10:53 pm near Karoonda. The meteorite wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrite
A chondrite is a stony (non-metallic) meteorite that has not been modified, by either melting or differentiation of the parent body. They are formed when various types of dust and small grains in the early Solar System accreted to form primitive asteroids. Some such bodies that are captured in the planet's gravity well become the most common type of meteorite by (whether quickly, or after many orbits) arriving on a trajectory toward the planet's surface. Estimates for their contribution to the total meteorite population vary between 85.7% and 86.2%. Their study provides important clues for understanding the origin and age of the Solar System, the synthesis of organic compounds, the origin of life and the presence of water on Earth. One of their characteristics is the presence of chondrules (from the Ancient Greek χόνδρος ''chondros'', grain), which are round grains formed as molten, or partially molten droplets, in the space by distinct minerals, that normally consti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Dodwell
George Frederick Dodwell (13 February 1879 in Leighton Buzzard, England – 10 August 1963 in Adelaide, Australia) was an Australian astronomer. Dodwell served as Government Astronomer for South Australia from 1909 to 1952. Life Dodwell was born in England but moved to New South Wales in 1887 and Adelaide, South Australia in 1888. He attended Port Adelaide School, Prince Albert College and received a Bachelor of Arts degree in mathematics from the University of Adelaide. He became a member of the Astronomical Society of South Australia and a Fellow of the Royal Astronomical Society. He was an assistant at the Adelaide Observatory from 1 March 1899. In 1907 he married Annie Louisa Virginia Trehy, herself a versatile scientist who died in 1924. He joined the staff of the Adelaide Observatory at West Terrace, University of Adelaide in March 1899, as a Junior Computor. In June 1909, after the death of Sir Charles Todd, Dodwell became Government Astronomer for South Australia, a posi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrite Meteorites
A chondrite is a stony (non-metallic) meteorite that has not been modified, by either melting or differentiation of the parent body. They are formed when various types of dust and small grains in the early Solar System accreted to form primitive asteroids. Some such bodies that are captured in the planet's gravity well become the most common type of meteorite by (whether quickly, or after many orbits) arriving on a trajectory toward the planet's surface. Estimates for their contribution to the total meteorite population vary between 85.7% and 86.2%. Their study provides important clues for understanding the origin and age of the Solar System, the synthesis of organic compounds, the origin of life and the presence of water on Earth. One of their characteristics is the presence of chondrules (from the Ancient Greek χόνδρος ''chondros'', grain), which are round grains formed as molten, or partially molten droplets, in the space by distinct minerals, that normally const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of South Australia
The history of South Australia includes the history of the Australian state of South Australia since Federation of Australia, Federation in 1901, and the area's preceding Indigenous Australian, Indigenous and British colony, British colonial societies. Aboriginal Australians of various nations or tribes have lived in South Australia for at least thirty thousand years, while British colonists arrived in the 19th century to establish a free colony. The ''South Australia Act, 1834'' created the Province of South Australia, built according to the principles of systematic colonisation, with no convict settlers; after the colony nearly went bankrupt, the ''South Australia Act 1842'' gave the British Government full control of South Australia as a Crown Colony. After some amendments to the form of government in the intervening years, South Australia became a self-governing colony in 1857 with the ratification of the ''Constitution Act 1856'', and the Parliament of South Australia was for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Museum Of Natural History
The American Museum of Natural History (abbreviated as AMNH) is a natural history museum on the Upper West Side of Manhattan in New York City. In Theodore Roosevelt Park, across the street from Central Park, the museum complex comprises 26 interconnected buildings housing 45 permanent exhibition halls, in addition to a planetarium and a library. The museum collections contain over 34 million specimens of plants, animals, fossils, minerals, rocks, meteorites, human remains, and human cultural artifacts, as well as specialized collections for frozen tissue and genomic and astrophysical data, of which only a small fraction can be displayed at any given time. The museum occupies more than . AMNH has a full-time scientific staff of 225, sponsors over 120 special field expeditions each year, and averages about five million visits annually. The AMNH is a private 501(c)(3) organization. Its mission statement is: "To discover, interpret, and disseminate—through scientific research and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossary Of Meteoritics
This is a glossary of terms used in meteoritics, the science of meteorites. # * 2 Pallas – an asteroid from the asteroid belt and one of the likely parent bodies of the CR meteorites. * 4 Vesta – second-largest asteroid in the asteroid belt and likely source of the HED meteorites. * 221 Eos – an asteroid from the asteroid belt and one of the likely parent bodies of the CO meteorites. * 289 Nenetta – an asteroid from the asteroid belt and one of the likely parent bodies of the angrites. * 3103 Eger – an asteroid from the asteroid belt and one of the likely parent bodies of the aubrites. * 3819 Robinson – an asteroid from the asteroid belt and one of the likely parent bodies of the angrites. * IA meteorite – an iron meteorite group now part of the IAB group/complex. * IAB meteorite – an iron meteorite and primitive achondrite of the IAB group/complex. * IB meteorite – an iron meteorite group now part of the IAB group/complex. * IC meteorite – an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
District Council Of Karoonda East Murray
The District Council of Karoonda East Murray is a local government area in the Murray Mallee area of South Australia. The main council offices are in Karoonda. The council area covers 4,415 square kilometres and had a population of approximately 1,100 at the 2016 Census. The annual average rainfall is 350 mm. It is entirely in the state electorate of Chaffey and the federal Division of Barker. History The council was established in 1979 when the District Council of Karoonda (established 1922) and the District Council of East Murray (established 1923) amalgamated. The township of Karoonda was established in 1913 when the mallee railway lines were put in place to open the area to grain growing, as previous pastoral runs had failed. Geography It includes the towns and localities of Bakara, Borrika, Copeville, Galga, Halidon, Karoonda, Marama, Mindarie, Perponda, Sandalwood Sandalwood is a class of woods from trees in the genus ''Santalum''. The woods are h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondritic Meteorite
A chondrite is a stony (non-Metallicity, metallic) meteorite that has not been modified, by either melting or planetary differentiation, differentiation of the parent body. They are formed when various types of dust and small grains in the early Solar System accreted to form primitive asteroids. Some such bodies that are captured in the planet's gravity well become the most common type of meteorite by (whether quickly, or after many orbits) arriving on a trajectory toward the planet's surface. Estimates for their contribution to the total meteorite population vary between 85.7% and 86.2%. Their study provides important clues for understanding the origin and age of the Solar System, the synthesis of organic compounds, the Abiogenesis, origin of life and the presence of water on Earth. One of their characteristics is the presence of chondrules (from the Ancient Greek χόνδρος ''chondros'', grain), which are round grains formed as molten, or partially molten droplets, in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon
Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent In chemistry, the valence (US spelling) or valency (British spelling) of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules. Description The combining capacity, or affinity of an ...—its atom making four electrons available to form covalent bond, covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust. Three Isotopes of carbon, isotopes occur naturally, Carbon-12, C and Carbon-13, C being stable, while Carbon-14, C is a radionuclide, decaying with a half-life of about 5,730 years. Carbon is one of the Timeline of chemical element discoveries#Ancient discoveries, few elements known since antiquity. Carbon is the 15th Abundance of elements in Earth's crust, most abundant element in the Earth's crust, and the Abundance of the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stony Meteorite
In meteoritics, a meteorite classification system attempts to group similar meteorites and allows scientists to communicate with a standardized terminology when discussing them. Meteorites are classified according to a variety of characteristics, especially mineralogical, petrological, chemical, and isotopic properties. Terminology There is no single, standardized terminology used in meteorite classification; however, commonly used terms for categories include ''types'', ''classes'', ''clans'', ''groups'', and ''subgroups''. Some researchers hierarchize these terms, but there is no consensus as to which hierarchy is most appropriate. Meteorites that do not fit any known group (though they may fit somewhere within a higher level of classification) are ''ungrouped''. Genetic relationships Meteorite classification may indicate that a "genetic" relationship exists between similar meteorite specimens. Similarly classified meteorites may share a common origin, and therefore may come ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nickel
Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive but large pieces are slow to react with air under standard conditions because a passivation layer of nickel oxide forms on the surface that prevents further corrosion. Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites that were not exposed to oxygen when outside Earth's atmosphere. Meteoric nickel is found in combination with iron, a reflection of the origin of those elements as major end products of supernova nucleosynthesis. An iron–nickel mixture is thought to compose Earth's outer and inner cores. Use of nickel (as natural meteoric nickel–iron alloy) has been traced as far back as 3500 BCE. Nickel was first isolated and classified as an e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium
Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point and high chemical reactivity. Like the other alkaline earth metals (group 2 of the periodic table) it occurs naturally only in combination with other elements and it almost always has an oxidation state of +2. It reacts readily with air to form a thin passivation coating of magnesium oxide that inhibits further corrosion of the metal. The free metal burns with a brilliant-white light. The metal is obtained mainly by electrolysis of magnesium salts obtained from brine. It is less dense than aluminium and is used primarily as a component in strong and lightweight alloys that contain aluminium. In the cosmos, magnesium is produced in large, aging stars by the sequential addition of three helium nuclei to a carbon nucleus. When such stars explode as supernovas, much of the magnesium is expelled into the interstellar medium where it ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
