a branch of astronomy and chemistry dealing with the chemical composition and evolution of the universe and its parts.
Origin of astrochemistry
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the study of the chemistry of celestial bodies and space, esp by means of spectroscopy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012