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How big is 南門二(半人馬座 α) B?

1,200,000 千米!

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南門二(半人馬座 α) B

Alpha Centauri B 則是南門二恆星系統中的第二大恆星. 直徑大約是一百萬公里, 比太陽 略小. 南門二 A 與 B 星非常接近, 因此我們從地球上看會是同一顆星.

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宇宙的刻度 > 南門二(半人馬座 α) B

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