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Glossary term: 天狼星

Description: 天狼星，又稱大犬星或大犬座阿爾法星，是夜空中最亮的恆星。它距離我們 8.6 光年，位於獵戶座附近的大犬座。我們看見的亮星是天狼星A，它的光譜型為A型。天狼星 A 有一顆引力約束伴星，即天狼星 B，它是一顆白矮星，在可見光波段非常暗，但在 X 射線波段很明亮。天狼B 太暗，且離天狼 A 太近，肉眼無法看到。

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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
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This is an automated transliteration of the simplified Chinese translation of this term

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

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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 姓名標示 4.0 國際 (CC BY 4.0) icons

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