盘点哈勃望远镜12项重大太空发现(组图)(3)

类星体明亮的光线
类星体令人难以捉摸并且非常神秘,自从1963年发现类星体之后,天文学家就一直致力于探测类星体是如何紧密地结合了光线和其他放射性物质。类星体位于宇宙外沿区域,能够产生大量的能量。类星体并不比太阳系大,但是其亮度却与拥有数千亿颗恒星的星系相当。
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