mean noon
Astronomy
noun
Noon as calculated by the motion of the mean sun; the moment at which the centre of the mean sun crosses either the local or the standard meridian.
Origin
Mid 18th century; earliest use found in John Robertson (1690–1761).
| 单词 | mean noon |
| 释义 | mean noonAstronomy noun Noon as calculated by the motion of the mean sun; the moment at which the centre of the mean sun crosses either the local or the standard meridian. Origin |
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