Alternative form of preplanetary

plural of planetary nebula

plural of planetary nebula

plural of planetary system

(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.

A planetary object

plural of planetary aberration

(astronomy) A deviation of where a planet appears to be, due to the motion of the planet during the time that the light reaches the Earth.

plural of planetary body

plural of planetary object