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📁 黑色Holes

This category is dedicated to sites about black holes - ultra-compact astronomical objects that are predicted by Einstein's theory of general relativity, whose gravity is so strong that not even light can escape.

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📁 奥比斯埃尔维阿特伊奥恩斯

📁 沃奥尔姆赫奥尔埃斯

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