noun🔗Share미행성체Any 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. "초기 태양계에서 먼지와 가스는 점차 뭉쳐 미행성체를 형성했고, 이들은 충돌하고 합쳐져 오늘날 우리가 아는 행성을 만들었습니다.astronomyspacescienceChat with AIVocabulary GamePractice Reading
