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

b. Astronomy. Designating a pair of stars which are at different distances from earth but are in almost the same line of sight, and so give the appearance of a binary star. Now chiefly in optical double.

ΚΠ

1868 J. N. Lockyer Elem. Lessons Astron. (1879) i. 20 Optical couples, in which the component stars are really distant from each other, and have no real connection.

1954 C. Payne-Gaposchkin Introd. Astron. (1956) xii. 293 Comparatively few close double stars are optical pairs.

1978 J. M. Pasachoff & M. L. Kutner University Astron. vi. 133 Sometimes a star appears double merely because two stars that are located at different distances from the sun appear in the same line of sight. Such systems are called optical doubles.

1990 D. H. Menzel & J. M. Pasachoff Field Guide Stars & Planets vi. 146 These stars, which are not physically linked, are called optical doubles, but are not considered true double stars.

单词	optical double
释义	> as lemmas optical double b. Astronomy. Designating a pair of stars which are at different distances from earth but are in almost the same line of sight, and so give the appearance of a binary star. Now chiefly in optical double. ΚΠ 1868 J. N. Lockyer Elem. Lessons Astron. (1879) i. 20 Optical couples, in which the component stars are really distant from each other, and have no real connection. 1954 C. Payne-Gaposchkin Introd. Astron. (1956) xii. 293 Comparatively few close double stars are optical pairs. 1978 J. M. Pasachoff & M. L. Kutner University Astron. vi. 133 Sometimes a star appears double merely because two stars that are located at different distances from the sun appear in the same line of sight. Such systems are called optical doubles. 1990 D. H. Menzel & J. M. Pasachoff Field Guide Stars & Planets vi. 146 These stars, which are not physically linked, are called optical doubles, but are not considered true double stars. extracted from opticaladj.n. < as lemmas
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