noun🔗Share彗星 A celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the Sun and having a "tail" of matter blown back from it by the solar wind as it approaches the Sun."Last night, we learned in science class that comets are icy objects from space that sometimes develop bright tails when they get close to the sun. "昨天在科学课上，我们学到彗星是来自太空的冰冻天体，当它们靠近太阳时，有时会形成明亮的尾巴。astronomyspacephysicssciencephenomenaChat with AIVocabulary GamePractice Reading
noun🔗Share彗星, 扫帚星 A celestial phenomenon with the appearance given by the orbiting celestial body."Looking through the telescope, the student saw faint, glowing comets streaking across the night sky. "透过望远镜，那个学生看到几颗模糊发光的彗星拖着光芒，划过夜空。astronomyspacephenomenaworldnatureChat with AIVocabulary GamePractice Reading
noun🔗Share彗星蜂鸟 Any of several species of hummingbird found in the Andes."While hiking in the Andes, we hoped to spot some comets flitting amongst the high-altitude flowers. "在安第斯山脉徒步时，我们希望能看到一些彗星蜂鸟在高山花朵间轻快地飞舞。animalbirdorganismChat with AIVocabulary GamePractice Reading
