In the early 1970s Princeton University astrophysicist Jeremiah Ostriker was puzzling over telescope observations of distant galaxies. These spinning cosmic discs did not contain nearly enough stars and other visible material for gravity to hold them together. The answer, he realised, must be that a much larger mass of unobserved “dark matter” stopped them flying apart.
在20世纪70年代初，普林斯顿大学(Princeton University)的天体物理学家杰里迈亚•奥斯特里克对遥远星系的望远镜观测感到困惑。这些旋转的宇宙圆盘中几乎没有足够的恒星和其他可见物质来通过引力将它们聚集在一起。他意识到，答案一定是有更大质量的未被观测到的“暗物质”阻止了它们分崩离析。
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