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Related to planetology: planetologist
The branch of astronomy that deals with the composition and structure of the planets of the solar system and with the relationships, similarities, and differences between them.
plan′e·to·log′i·cal (plăn′ĭ-tl-ŏj′ĭ-kəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Astronomy) astronomy the study of the origin, composition, and distribution of matter in the planets
plan•e•tol•o•gy(ˌplæn ɪˈtɒl ə dʒi)
the study of the planets.
plan`e•to•log′i•cal (-tlˈɒdʒ ɪ kəl) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
the branch of astronomy that studies the planets. — planetologist, n. — planetologic, planetological, adj.See also: Astronomy
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.