planetology

[ plan-i-tol-uh-jee ]

noun

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

planetology

/ ˌplænɪˈtɒlədʒɪ /

noun

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

Other Words From

• plan·e·to·log·i·cal [plan-i-tl-, oj, -i-k, uh, l], adjective
• planetolo·gist noun

Word History and Origins

Origin of planetology¹

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