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 iron meteorite that is part of the IC group.
Ablation – the process of a meteorite losing mass during the passage through the atmosphere.
Acapulcoite – a group of primitive achondrites.
Accretion – the process in which matter of the protoplanetary disk coalesces to form planetesimals.
Achondrite – a differentiated meteorite (meaning without chondrules).
Aerolite – an old term for stony meteorites.
ALH – an abbreviation used for meteorites from Allan Hills.
Allan Hills 84001 – is an exotic meteorite from Mars that does not fit into any of the SNC groups and was thought to contain evidence for life on Mars.
Allende meteorite – is the largest carbonaceous chondrite ever found on Earth.
Amphoterite – an obsolete classification of chondritic meteorites that are now classified as LL.
Angrite – a basaltic meteorite.
ANSMET – the Antarctic Search for Meteorites is a scientific program that looks for meteorites in the Transantarctic Mountains.
Asteroidal achondrite – an achondrite that differentiated on an asteroid or planetesimal (see planetary achondrite)
Asteroid spectral types – classification of asteroids according to their spectra.
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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. There is no single, standardized terminology used in meteorite classification; however, commonly used terms for categories include types, classes, clans, groups, and subgroups.
Meteoritics is the science that deals with meteors, meteorites, and meteoroids. It is closely connected to cosmochemistry, mineralogy and geochemistry. A specialist who studies meteoritics is known as a meteoriticist. Scientific research in meteoritics includes the collection, identification, and classification of meteorites and the analysis of samples taken from them in a laboratory. Typical analyses include investigation of the minerals that make up the meteorite, their relative locations, orientations, and chemical compositions; analysis of isotope ratios; and radiometric dating.
A chondrule (from Ancient Greek χόνδρος chondros, grain) is a round grain found in a chondrite. Chondrules form as molten or partially molten droplets in space before being accreted to their parent asteroids. Because chondrites represent one of the oldest solid materials within the Solar System and are believed to be the building blocks of the planetary system, it follows that an understanding of the formation of chondrules is important to understand the initial development of the planetary system.
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