the science dealing with the structure and composition of planets and other bodies in the solar system.
Origin of astrogeology
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the study of the structure, composition, and history of other planets and other bodies in the solar system
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