A Complete Collection of 100000 Whys
Fav十万个为什么
为什么宇宙中有黑暗物质？
1、观测到星系旋转速度异常快，无法用可见物质解释，推测存在暗物质提供额外引力。
2、宇宙微波背景辐射的微小不均匀性，暗物质在早期宇宙中起到了关键作用。
3、暗物质不与电磁波相互作用，因此不发光也不反射光，只能通过引力效应间接探测。
4、星系团和大型结构形成过程中，暗物质起到了骨架作用，引导可见物质聚集。
5、暗物质占宇宙总质能的约27%，远超可见物质，对宇宙演化有决定性影响。
总之，暗物质的存在是为了解释观测到的宇宙现象，如星系旋转、结构形成等，是现代宇宙学的重要理论支撑。
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