Comets (Astronomy)
《英文msh詞典》Comets (Astronomy)
[同義詞] Comets (Astronomy)
[主題詞] Meteoroids
[英文釋義] Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms,4th ed)