Did you know there's a black hole in the center of our galaxy? No Time Dilation for Distant Quasars? Galactic Monster Mystery solved?
你知道我们银河系中心有一个黑洞吗？别瞪大眼睛搜寻那遥远的类星体——那没用！银河系大揭秘。
Did you know there's a black hole in the center of our galaxy? No Time Dilation for Distant Quasars? Galactic Monster Mystery solved?
你知道我们银河系中心有一个黑洞吗？别瞪大眼睛搜寻那遥远的类星体——那没用！银河系大揭秘。
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