Review of Short Phrases and Links|
This Review contains major "Meteorites"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Meteorites are believed to be fragments produced by collisions among small bodies formed by the same process that created the solar system.
- Meteorites are pieces of ancient material that survive their fall to Earth from space.
- Meteorites are samples of planetesimals that reach a planetary surface, and provide a great deal of information about the formation of our Solar System.
- Meteorites are always named for the place where they were found,[ 5] usually a nearby town or geographic feature.
- Meteorites are believed to represent the major composition of material from which the Earth was formed.
- One large family of achondrites (the HED meteorites) may have originated on the asteroid 4 Vesta.
- Meteorites from the asteroid 6 Hebe.
- Stony Meteorite A class of meteorites composed mostly of silicate minerals.
- Iron meteorites are classified according to both structure and chemistry.
- Nickel-iron is one class of meteorites.
- It is also theorized that meteorites caused other mass extinction events as well throughout the history of the earth.
- Now the spectra of Vesta and Braille also match those of some meteorites.
- Keil K. (2000). "Thermal alteration of asteroids: evidence from meteorites".
- Twelve meteorites are apparently samples from Mars.
- Twelve meteorites from the Moon have been found to this day.
- Fewer than 1 percent of the meteorites discovered on earth are pallasite meteorites, known for their crystals embedded in iron, Mani said.
- Gooding, J. L. 1992. Soil mineralogy and chemistry on Mars: Possible clues from salts and clays in SNC meteorites.
- According to news from the State Bureau of Oceanography, the meteorites were found at the bottom of a cliff in Grove Mountains.
- In cases where many meteorites were found in one place, the name may be followed by a number or letter (e.g., Allan Hills 84001 or Dimmitt (b)).
- In other words, most meteorites falling on Earth are by far chondrites.
- Enstatite is a common mineral in meteorites.
- Enstatite is found in very oxidised chondrite meteorites and in diogenites.
- One scientist proposed that the mascons are heavy iron meteorites that plunged deep into the Moon while it was in a soft, formable stage.
- A few rare meteorites come from the Moon and Mars.
- More detailed descriptions of these rare meteorites is beyond the scope of this review.
- Presolar grains in many meteorites found on Earth contain nanodiamonds of extraterrestrial origin, probably formed in supernovas.
- Chladni also studied meteorites and proposed that they are of extraterrestrial origin.
- Some meteorites contain microscopic diamonds that were formed when the solar system was still a protoplanetary disk.
- A handful of objects are known that are surely meteorites and may be of Martian origin.
- Geochemical analysis has shown that more than a dozen known meteorites are of lunar origin and more than a dozen others are of Martian origin.
- Meteorites may look very much like Earth rocks, or they may have a burned appearance.
- The Martian meteorites (as well as Viking soil analyses) all plot to the left of the fields for Earth rocks.
- Some presolar grains in primitive meteorites consists of Hibonite.
- Chondrites are the most primitive meteorites known.
- It should be emphasized that the alteration processes involved here took place on the parent bodies of the meteorites, not after their arrival on Earth.
- More than 99.8 percent of the 30,000 meteorites found on Earth to date are believed to have originated in the asteroid belt.
- Some meteorites, such as carbonaceous chondrites, contain carbonaceous material.
- Over 80% of these were iron and stony-iron meteorites, which are easily distinguished from local rocks.
- Mathilde is very dark, blacker than coal, and is thought to share the same composition as carbonaceous chondrite meteorites.
- Deimos is composed of rock rich in carbonaceous material, much like C-type asteroids and carbonaceous chondrite meteorites.
- Perovskite also is a common mineral in the Ca-Al-rich inclusions (CAIs) found in some chondritic meteorites.
- It is also found in small amounts in many chondritic meteorites.
- Esthetically, pallasites are easily the most beautiful meteorites, especially when cut and polished.
- One type, called pallasites, is thought to have originated in the boundary zone above the core regions where iron meteorites originated.
- Although nickel-iron is found on the Earth, the particular minerals kamacite and taenite are so far only found in meteorites.
- Taenite (Fe,Ni) is a mineral found naturally on Earth mostly in iron meteorites.
- Small crystallites of peridot are often found in the basalt rocks created by volcanoes and have been found in iron-nickel meteorites called pallasites.
- Possibly the most unusual peridot is that which comes from iron-nickel meteorites called pallasites.
- Forsterite is also found in many iron-nickel meteorites.
- Troilite is regularly found in Martian meteorites (i.e.
- The previously analyzed Mars samples include Martian meteorites found on Earth and rocks analyzed by the Mars Pathfinder rover in 1997.
- Included among these are a large number of lunar and Martian meteorites, making Oman a particularly important area both for scientists and collectors.
- Even so, falling meteorites have reportedly caused damage to property, livestock and people.
- The vast majority (or about 90%) of stony meteorites are chondrites.
- Interplanetary transfer of material is well documented, as evidenced by meteorites of Martian origin found on Earth.
- A small number of meteorites found on Earth are known to have originated on Mars.
- Stony-Iron A class of meteorites composed mostly of an intimate mixture of silicates and iron metal.
- In contrast, meteorites from the feldspathic highlands are rich in aluminum and poor in iron.
- Carbonaceous chondrite meteorites contain carbon and hydrocarbons.
- Such meteorites include chondrite s, collections of debris from the early solar system, and pallasite s, mixes of iron-nickel and olivine.
- In meteorites, olivine is important in some pallasites.
- Some amino acids have even been detected in meteorites, especially in a type known as carbonaceous chondrites.
- Some people say "meteorite impact," others say "meteoroid impact.") Most (~99.8%) meteorites are pieces of asteroids.
- Because xenon is a tracer for two parent isotopes, xenon isotope ratios in meteorites are a powerful tool for studying the formation of the solar system.
- The 129 I - 129 Xe chronometer gives an estimate of the time period for formation of primitive meteorites of about 20 million years.
- New types of meteorites and rare meteorites have been found.
- Amphoterite is an obsolete term used to describe chondritic meteorites that are now classified as LL (Low Iron and Low total metal content) types.
- Martian meteorites need to be thrown out beyond martian gravity into orbits that may be perturbed or decay to allow eventual Earth-crossing encounters.
- Aubrites are believed to come from E-type asteroids, although it has also been suggested that they are what meteorites from Mercury might look like.
- Now Brett Gladman and Jaime Coffey (University of British Columbia, Vancouver) say we should expect a few meteorites from Mercury too.
- Galaxies > Milky Way Galaxy > Solar System > Asteroids
- Encyclopedia of Keywords > Places > Earth
- Milky Way Galaxy > Solar System > Asteroids > Comets
- Astronomy > Universe > Planets > Mars
* Associated Minerals
* Billion Years
* Billion Years Old
* Cosmic Rays
* Green Fireballs
* High Concentrations
* Ice Sheets
* Igneous Rocks
* Impact Craters
* Iron Meteorites
* Isotopic Composition
* Lunar Meteorites
* Lunar Rocks
* Lunar Samples
* Moon Rocks
* Native Americans
* Outer Space
* Rare Forms
* Several Persons
* Small Amounts
* Solar Nebula
* Solar System
* Stony Meteorites
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