| 单词 | parallactic angle |
| 释义 | > as lemmasparallactic angle parallactic angle n. the angle formed at a celestial object by the intersection of arcs drawn on the celestial sphere to the observer's zenith and to the celestial pole. ΚΠ 1668 H. Oldenburg Let. 3 Jan. in J. Wallis Corr. (2003) II. 377 To subtend the parallactic angle. 1681 J. Flamsteed Gresham Lect. (1975) 108 Therefore the parallactick Angle 37°–44' [sic]. 1789 Philos. Trans. (Royal Soc.) 79 59 I have calculated them two different ways, viz. by the method of parallactic angles, and by the method of the nonagesimal. 1994 J. North Fontana Hist. Astron. & Cosmol. iv. 103 (caption) The parallactic angle clearly increases to a maximum when the object is near our horizon and we are at B in the figure. < as lemmas |
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