noun🔗Share小惑星An asteroid of any size"1979 Tsunami generation by pelagic planetoid impact"1979年の外洋小惑星の衝突による津波発生。astronomyspaceChat with AIVocabulary GamePractice Reading
noun🔗Share準惑星, 小惑星状天体An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object"Astronomers classify Eris, a distant object in the Kuiper belt, as a planetoid because it orbits the Sun far beyond Neptune. "天文学者は、海王星のはるか外側で太陽を周回しているため、カイパーベルトの遠方の天体であるエリスを準惑星に分類します。astronomyspacescienceChat with AIVocabulary GamePractice Reading
noun🔗Share小惑星A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna"1991 Optimal trajectories for an ion driven spacecraft from earth to the planetoid Vesta"1991 地球から小惑星ベスタへのイオン推進宇宙船の最適な軌道。astronomyspaceChat with AIVocabulary GamePractice Reading
noun🔗Share準惑星A dwarf planet"Pluto is a planetoid, not a full-fledged planet. "冥王星は準惑星であり、本格的な惑星ではありません。astronomyspaceChat with AIVocabulary GamePractice Reading
