How to Say "celestial bodies" in Spanish
The Spanish word for “celestial bodies” is “planetas” — A2 level. This is a very common word in everyday Spanish.

Examples
Todos los planetas de nuestro sistema giran alrededor del Sol.
All the planets in our system revolve around the Sun.
Los astrónomos descubrieron tres nuevos planetas que podrían albergar vida.
Astronomers discovered three new planets that could harbor life.
La gravedad de los planetas gigantes ayuda a proteger la Tierra de asteroides.
The gravity of the giant planets helps protect Earth from asteroids.
Unexpected Gender
Even though 'planetas' ends in -as, the singular form ('planeta') is masculine, so you must use 'los' (the) and masculine adjectives with it, like 'los planetas grandes' (the big planets).
Gender Confusion
Mistake: “Las planetas son interesantes.”
Correction: Los planetas son interesantes. (The planets are interesting.) The word is masculine, regardless of the -a ending.
Related Translations
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.