| 单词 | parallactic motion |
| 释义 | > as lemmasparallactic motion parallactic motion n. the change in the apparent position of a celestial object resulting from change in the observer's position. ΚΠ 1804 Philos. Trans. (Royal Soc.) 94 360 The motion of the solar system, towards this assumed point, will produce an opposite parallactic motion, in every star that is not too far from us to be sensibly affected by it. 1938 R. L. Waterfield Hundred Years of Astron. vii. 126 Although we cannot find the parallactic motions and hence the distances of individual stars, we can find the average parallactic motions and hence the average distances of large groups of stars. 1998 Proc. National Acad. Sci. U.S.A. 95 9/1 In ground-based parallax measurement, one can measure only the parallactic motion of a nearby star relative to the positions of fainter background stars in the same field. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。