from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy Any secondary body in the
Solar systemthat is geologically differentiated or in hydrostatic equilibriumand thus has a planet-like geology: a planet, dwarf planet, or the larger moons and asteroids.
- noun astronomy Any substantial body in orbit around the
Sunor other star: a planet, minor planet, or comet.
- noun astronomy Any substantial body associated with the development of planets: a
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