
Cosmochemistry (from Greek κόσμος kósmos, `universe` and χημεία khemeía) or chemical cosmology is the study of the chemical composition of matter in the universe and the processes that led to those compositions. This is done primarily through the study of the chemical composition of meteorites and other physical samples. Given that.....
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http://en.wikipedia.org/wiki/Cosmochemistry

cosmochemistry 1. The study of the chemical properties of the heavenly bodies and of the formation and distribution of elements and compounds in them and in the universe as a whole. 2. The branch of science which treats of the chemical composition of the universe and its origin.
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http://www.wordinfo.info/words/index/info/view_unit/2432/5

the science dealing with the occurrence and distribution of chemical elements in the universe.
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https://www.infoplease.com/dictionary/cosmochemistry
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