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Definition of Planetary object
1. 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. ¹
2. Noun. (astronomy) Any substantial body in orbit around the Sun or other star: a planet, minor planet, or comet. ¹
3. Noun. (astronomy) Any substantial body associated with the development of planets: a protoplanet, planetesimal. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Planetary Object
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