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[[Category: Astronomy]][[Category: Astrobiology]] | [[Category: Astronomy]][[Category: Astrobiology]] | ||
== Explanation == | == Explanation == | ||
| − | Chondrites are a class of [[ | + | Chondrites are a class of [[meteorites]] that are found on [[Earth]]. They are [[stony meteorite]]s that are a part of larger [[asteroid]]s that were formed during the planetary formation from the solar [[nebula]]. These asteroids are believed to have materials that were formed at that time. Before some parts of these asteroids could melt themselves and alter its chemical composition some rocky parts broke off as [[meteoroid]]s and crashed into [[planet]]s. Such meteorites are known as chondrites. On examining such meteorites, one can find silicate objects called as [[chondrule]]s. Due to their chemical composition, subclasses of these meteorites are studied extensively for astrobiological organic chemistry and origins of organic life. |
== Frequently Asked Questions == | == Frequently Asked Questions == | ||
=== How are chondrites linked to abiogenesis? === | === How are chondrites linked to abiogenesis? === | ||
Origin of organic [[life]] predates the origin of Earth, and there are reasons to believe that they are extraterrestrial in nature. A good explanation for life on Earth and a source that fits well into this notion are a special type of meteorite rich in carbon, called as carbonaceous chondrites. On 28th September 1969 one such meteorite fell to Earth near Murchison, Australia. On analysis, the Murchison meteorite is found to be rich in [[organic compound|carbon compounds]] and had undergone extensive aqueous alteration in its parent body, with evidence suggesting the possibility of [[abiogenesis]] in it. Further analyses of other few meteorites from Antarctica, focused on such observations had shown the presence of [[amino acid]]s unaltered by the Earth's terrestrial contamination. Therefore, chondrites make a good candidate to look for the traces of origins of life. | Origin of organic [[life]] predates the origin of Earth, and there are reasons to believe that they are extraterrestrial in nature. A good explanation for life on Earth and a source that fits well into this notion are a special type of meteorite rich in carbon, called as carbonaceous chondrites. On 28th September 1969 one such meteorite fell to Earth near Murchison, Australia. On analysis, the Murchison meteorite is found to be rich in [[organic compound|carbon compounds]] and had undergone extensive aqueous alteration in its parent body, with evidence suggesting the possibility of [[abiogenesis]] in it. Further analyses of other few meteorites from Antarctica, focused on such observations had shown the presence of [[amino acid]]s unaltered by the Earth's terrestrial contamination. Therefore, chondrites make a good candidate to look for the traces of origins of life. | ||