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Because the gravitational pull from these unobservable matter is so huge that little planets, rocks, and dusts cannot account for it.
by ww520 9y ago
Because the gravitational pull from these unobservable matter is so huge that little planets, rocks, and dusts cannot account for it.
- AnimalMuppet 9y agoSure they can - if there's enough of them. The problem is, "enough of them" should be optically visible too...