noun🔗Share微惑星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. "初期の太陽系では、塵とガスが徐々に集まって微惑星を形成し、それらが衝突と合体を繰り返して、私たちが今日知っている惑星が作られました。astronomyspacescienceChat with AIVocabulary GamePractice Reading
