- Moon by Webster's
(n.) A secondary planet or satellite, revolving about any member of the solar system; as, the moons...
- Europa by Jasmine Ramos
[ yu̇′rō·pə] (astronomy) A satellite of Jupiter with a mean distance from Jupiter of 4.17 ×...
- Io by Olivia Stevenson
Io., in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. Io is subject to...
- Uranus by Webster's
(n.) One of the primary planets. It is about 1,800,000,000 miles from the sun, about 36,000 miles...
- satellite, natural by Sierra Wilson
Celestial body orbiting a planet, dwarf planet, asteroid, or star of a larger size. The most...