单词 | velocity dispersion |
释义 | velocity dispersionvelocity dispersionA measure of the spread of velocities of members within a cluster of galaxies or of stars. If both radius, R , and velocity dispersion, V , of a cluster are measured, an estimate of mass, V 2R /G , is obtained.velocity dispersion[və′läs·əd·ē di′spər·zhən] |
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