| 单词 | space velocity |
| 释义 | > as lemmasspace velocity space velocity n. Astronomy the velocity in space relative to the sun of a star or other object outside the solar system, equal to the vector sum of the proper motion of the object and its radial velocity. ΘΚΠ the world > the universe > star > stellar motion > [noun] > velocity radial velocity1870 space velocity1909 1909 Science 19 Nov. 732/2 The resulting space velocity of this star is about 261 km. per second. 2001 F. Watson in P. Moore 2002 Yearbk. Astron. ii. 239 By using alternative methods of obtaining distances for a local subset of these galaxies.., it will be possible to estimate their actual space velocities over and above their motion due to the expansion of the Universe. < as lemmas |
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