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主題: 測量銀河外系恆星移動 作者: peter 於 2017-11-30 13:20:38 https://www.sciencedaily.com/releases/2017/11/171127124737.htm
(https://www.sciencedaily.com/images/2017/11/171127124737_1_540x360.jpg) The movement of stars depends mostly on the invisible dark matter halo around a galaxy. Credit: ESO/Digitized Sky Survey 2 University of Groningen astronomers have been able to measure the proper motion of 15 stars in the Sculptor Galaxy, |