blue planet

noun

Any exoplanet, putative or known, whose climate is similar enough to Earth's in which humans take special interest as a possible home world of exolife, a possible target for colonization, or both.

Similar
Third Planet
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Meanings

blue planet1

nounblue planet (plural blue planets)

plural blue planets

  1. Any exoplanet, putative or known, whose climate is similar enough to Earth's in which humans take special interest as a possible home world of exolife, a possible target for colonization, or both.
proper nounthe blue planet
  1. Alternative letter-case form of Blue Planet.

Blue Planet2

proper nounthe Blue Planet
  1. The planet Earth.

    Synonyms: Third Planet

Synonyms & antonyms

proper nounThe planet Earth.

Similar
Third Planet
Also see
third planet

Translations

Czech modrá planeta
  • modrá planetaEarth
French planète bleue
  • planète bleueEarth
Japanese 青い惑星
  • 青い惑星 (aoi wakusei)Earth
Portuguese planeta azul
  • planeta azulEarth
Russian голуба́я плане́та
  • голуба́я плане́та (golubája planéta)Earth
Cite this entry
APA

blue planet. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/blue%20planet

MLA

“blue planet.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/blue%20planet. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “blue planet,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/blue%20planet.

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