noun🔗Share小惑星An asteroid of any size"1979 Tsunami generation by pelagic planetoid impact"1979年、外洋の小惑星衝突による津波発生。astronomyspaceChat with AIVocabulary GamePractice Reading
noun🔗Share準惑星An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object"Astronomers study planetoids like Pluto and other Kuiper belt objects to understand the early formation of our solar system. "天文学者は、太陽系の初期形成を理解するために、冥王星やその他のカイパーベルト天体のような準惑星を研究しています。astronomyspaceChat 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"Astronomers are studying the characteristics of several planetoids located in the Kuiper Belt, to learn more about their composition and formation. "天文学者は、その組成と形成についてさらに学ぶために、カイパーベルトに位置するいくつかの準惑星の特性を研究しています。astronomyspaceChat with AIVocabulary GamePractice Reading
