[問題] 宇宙膨脹的原因??
如題，為何宇宙能一直膨脹呢?最近又聽說不只是膨脹，連膨脹的速度都變快了，宇宙膨脹過程中，難道不用付出任何代價嗎?宇宙可以一直膨脹，難道空間不是有限的嗎? 請高手解答。另外我想問，這類的學問大概什麼學科可以學到?
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