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How big is 天狼星(大犬座 α) A?

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天狼星(大犬座 α) A

Sirius A 是全夜空中最亮的一颗星. 几乎是第二亮星老人星的两倍亮. 然而天狼星并不大, 它看起来亮是因为距离我们只有 8 光年远.

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Розмір Всесвіту > 天狼星(大犬座 α) A

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