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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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The bow tie shaped Orion over dry, rocky outcrops. Sirius appears as a bright star between two pillars of rock

Winter Constellations

Caption: Second place in the 2022 IAU OAE Astrophotography Contest, category Time lapses of celestial patterns.   Sirius, the brightest star in the night sky, is shown rising, setting and passing by. Sometimes constellations and asterisms are also visible, including Orion, Taurus and the Pleiades. In the first scene, the aforementioned constellations are covered by a semi-transparent golden veil. The next scenes show it rising in a dark blue night sky. In one of the scenes, a planet brightly decorates the faint constellation Pisces. The videos were taken above various landscapes and places of cultural heritage on Earth. Some of them simply show monuments in the desert, while others show palm trees with waving leaves.
Credit: Amirreza Kamkar/IAU OAE

License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons