noun🔗Share星子, 微行星 Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction."In the early solar system, dust and gas gradually clumped together, forming planetesimals, which then collided and merged to create the planets we know today. "在早期的太阳系中，尘埃和气体逐渐聚集在一起，形成了许多星子 (微行星)，这些星子随后碰撞融合，最终形成了我们今天所知的行星。astronomyspacescienceChat with AIVocabulary GamePractice Reading
