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Definition of Double planet
1. Noun. a planet with a moon large enough to be considered a planet, were the planet not there, having a substantial portion of the system's overall mass. ¹
2. Noun. a pair of planemos in orbit around each other, where the barycenter of their orbits lies outside of both planemos, which in turn is in orbit about a star. ¹
3. Noun. a pair of planemos in orbit around each other, where the barycenter of their orbits lies outside of both planemos. ¹
4. Noun. a planemo with a moon large enough to be considered a planemo, having a substantial portion of the system's overall mass. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Double Planet
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