planetarian

[ plan-i-tair-ee-uh n ]
/ ˌplæn ɪˈtɛər i ən /

noun

a staff member at a planetarium.
an inhabitant of a planet.

adjective

of or relating to a planetarian.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019