同樣。黑洞就是不發光的大天體，或天體群。

來源: stvw 於 2012-02-02 20:14:58 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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同樣。 黑洞就是不發光的大天體，或天體群。