planetologist


plan·e·tol·o·gy

P0350050 (plăn′ĭ-tŏl′ə-jē)n. 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.plan′e·tol′o·gist n.

planetologist

(ˌplænɪˈtɒlədʒɪst) n (Astronomy) astronomy someone who studies or specializes in planetology