double planet

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.

Similar
binary planet
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Meanings

noundouble planet (plural double planets)

plural double planets

  1. astronomyA 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.

    Synonyms: binary planet

  2. astronomyA 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.
  3. astronomyA pair of planemos in orbit around each other, where the barycenter of their orbits lies outside of both planemos.
  4. astronomyA planemo with a moon large enough to be considered a planemo, having a substantial portion of the system's overall mass.

Synonyms & antonyms

nounA 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.

Similar
binary planet
Also see
binary planet
Cite this entry
APA

double planet. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/double%20planet

MLA

“double planet.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/double%20planet. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “double planet,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/double%20planet.

Source: double planet on Wiktionary, CC BY-SA 4.0.