double planet
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English
Noun
double planet (plural double planets)
- (astronomy) 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.
- (astronomy) 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.
- (astronomy) A pair of planemos in orbit around each other, where the barycenter of their orbits lies outside of both planemos.
- (astronomy) A planemo with a moon large enough to be considered a planemo, having a substantial portion of the system's overall mass.
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References
double planet on Wikipedia.Wikipedia
