英语词汇“julian ephemeris century”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	julian ephemeris century
释义	Julian ephemeris century Julian ephemeris century [′jül·yən ə′fem·ə·rəs ′sen·chə·rē] (astronomy) The unit of ephemeris time (ET) in Simon Newcomb's formulas which relate the orbital position of the earth to ephemeris time; the Julian ephemeris century is subdivided into 36,525 days, and 1 ephemeris day = 86,400 ephemeris seconds.
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Julian ephemeris century