英语词汇relative proper motion怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

　

单词	relative proper motion
释义	Definition of relative proper motion in English: relative proper motion noun Astronomy The proper motion of a star or other celestial object relative to a set of reference points. Origin Late 18th century; earliest use found in William Herschel (1738–1822), musician and astronomer. Definition of relative proper motion in US English: relative proper motion noun Astronomy The proper motion of a star or other celestial object relative to a set of reference points. Origin Late 18th century; earliest use found in William Herschel (1738–1822), musician and astronomer.
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更新时间：2024/10/19 15:28:07