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单词
local sidereal noon
释义
local sidereal noon
local sidereal noon
[
′lō·kəl sə¦dir·ē·əl ¦nün
]
(astronomy)
Zero hour local sidereal time, or the instant the vernal equinox is over the upper branch of the local meridian; local sidereal noon at the Greenwich meridian is called Greenwich sidereal noon.
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更新时间:2026/2/28 6:45:15