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3 Puppis
3 Puppis (3 Pup) is a binary star system〔 in the constellation Puppis. Its apparent magnitude is 3.93. It is a white supergiant with a spectral class of A3Iab. It is surrounded by a cloud of circumstellar dust, which is unusual for an A-type star, suggesting that it may actually be a low-mass star transitioning from an asymptotic giant branch phase to a planetary nebula. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「3 Puppis」の詳細全文を読む
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