Glossary term: 天狼星
Description: 天狼星,又称大犬星或大犬座阿尔法星,是夜空中最亮的恒星。它距离我们 8.6 光年,位于猎户座附近的大犬座。我们看见的亮星是天狼星A,它的光谱型为A型。天狼星 A 有一颗引力约束伴星,即天狼星 B,它是一颗白矮星,在可见光波段非常暗,但在 X 射线波段很明亮。天狼B 太暗,且离天狼 A 太近,肉眼无法看到。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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Credit: Amirreza Kamkar/IAU OAE
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