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planetology

American

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

noun

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

planetology British

/ 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

Other Word Forms

Etymology

Origin of planetology

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

As a matter of comparative planetology, Venus is an intriguing target for intensive study.

From Slate • Jan. 26, 2021

What is comparative planetology and why is it useful to astronomers?

From Textbooks • Oct. 13, 2016

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023