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词汇 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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