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单词 astronomical horizon
释义

Definition of astronomical horizon in English:

astronomical horizon

noun

  • The horizon that would be seen if the earth's surface were perfectly smooth; the intersection of a horizontal plane through an observer with the celestial sphere.

Origin

Mid 18th century; earliest use found in Temple Henry Croker (1729–?1790), writer.

Definition of astronomical horizon in US English:

astronomical horizon

noun

  • The horizon that would be seen if the earth's surface were perfectly smooth; the intersection of a horizontal plane through an observer with the celestial sphere.

Origin

Mid 18th century; earliest use found in Temple Henry Croker (1729–?1790), writer.
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更新时间：2025/7/4 9:21:45