求翻译：Last summer, I came to Beijing to visit the Department of Astronomy Science and Technology Museum, where the really amazing. I walked into the Department of Astronomy Main Hall, as if I came to the mystery of the universe ever. I know where the Jiutaixingxing the situation in these planets, some sets are beautiful garlands, and some on the tip of the planet, the valley, some often Feishazoushi above, like some of the surface temperature of the volcanic magma, some of the planet Surface temperature is too low, not fit for human life. I also know that the Beelzebub in the universe - black holes!是什么意思？

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