英语词汇“clock-star”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

clock-star n. Astronomy (now historical) any of a series of stars which had very accurately known positions and were used as reference points for the determination of sidereal time; chiefly in plural.

ΚΠ

1837 Astron. Observ. Royal Observatory Greenwich 1836 Introd. p. lxii It appears, from a comparison of the assumed A.R. of the principal clock-stars with those used in the Cambridge Observations, that the errors thus altered, will correspond to the same equinox.

1930 J. H. Jeans Universe around Us (ed. 2) Introd. 10 The remotest of nebulae arouse incomparably more enthusiasm than ‘clock-stars’.

2000 H. G. Walter & O. J. Sovers Astrometry Fund. Catal. i. 33 The clock-star system greatly simplifies the determination of absolute right ascensions of other objects as they need only to be observed relative to clock-stars.

单词	clock-star
释义	> as lemmas clock-star clock-star n. Astronomy (now historical) any of a series of stars which had very accurately known positions and were used as reference points for the determination of sidereal time; chiefly in plural. ΚΠ 1837 Astron. Observ. Royal Observatory Greenwich 1836 Introd. p. lxii It appears, from a comparison of the assumed A.R. of the principal clock-stars with those used in the Cambridge Observations, that the errors thus altered, will correspond to the same equinox. 1930 J. H. Jeans Universe around Us (ed. 2) Introd. 10 The remotest of nebulae arouse incomparably more enthusiasm than ‘clock-stars’. 2000 H. G. Walter & O. J. Sovers Astrometry Fund. Catal. i. 33 The clock-star system greatly simplifies the determination of absolute right ascensions of other objects as they need only to be observed relative to clock-stars. extracted from clockn.¹adv. < as lemmas
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> as lemmas