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Definition of Planemo
1. Noun. (astronomy) an astronomical object with enough mass to achieve hydrostatic equilibrium, but not enough initiate core fusion at any time in its existence. That is, it is rounded in shape and is smaller than a star. Planemos include planets, dwarf planets, and the larger moons of the Solar System, but also sub-brown dwarfs and rogue planets between the stars. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Planemo
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