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How big is 南门二(半人马座 α) C?

210,000 kilometers!

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南门二(半人马座 α) C

Proxima Centauri 是除了太阳以外距离地球最近的恒星, 因此英文名称来自'proximity'( 接近). 它是一颗小型红色恒星. 不过因为它很暗淡, 需要望远镜才看得到.

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Scale of the Universe > 南门二(半人马座 α) C

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