单词	celestial body
释义	celestial body noun variants or less commonly celestial object plural celestial bodies also celestial objects : an aggregation of matter in the universe (such as a planet, star, or nebula) that can be considered as a single unit (as for astronomical study) But many scientists began seriously rethinking their notions of the solar system in 1992, when we identified a small celestial body—just a few hundred kilometers across—sited farther from the sun than any of the known planets. Jane X. Luu et al. As the observer looks at a star or other celestial body its light rays pass through a single point on the earth's surface. Dutton's Navigation and Piloting, 14th edition A black hole forms when a star or other celestial object collapses under the pull of its own gravity. Mary Durack Miller called also heavenly body Word History First Known Use 1538, in the meaning defined above
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