planetology

[ plan-i-tol-uh-jee ]
/ ˌplæn ɪˈtɒl ə dʒi /

noun

the branch of astronomy that deals with the physical features of the planets.

Origin of planetology

First recorded in 1905–10; planet + -o- + -logy

Related forms

plan·e·to·log·i·cal [plan-i-tl-oj-i-kuh l] /ˌplæn ɪ tlˈɒdʒ ɪ kəl/, adjectiveplan·e·tol·o·gist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for planetologist

planetology

/ (ˌplænɪˈtɒlədʒɪ) /

noun

astronomy the study of the origin, composition, and distribution of matter in the planets
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