planetary object English

Meaning planetary object meaning

What does planetary object mean?

planetary object noun

— (astronomy) Any secondary body in the Solar system that is geologically differentiated or in hydrostatic equilibrium and thus has a planet-like geology: a planet, dwarf planet, or the larger moons and asteroids.

— (astronomy) Any substantial body in orbit around the Sun or other star: a planet, minor planet, or comet.

— (astronomy) Any substantial body associated with the development of planets: a protoplanet, planetesimal.