恒星
天狼星
Sirius
The brightest star in the night sky
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简介
Sirius is a binary system about 8.6 light-years away: a white A-type star, larger and brighter than the Sun, with Sirius B, a white dwarf companion. It lies in the constellation Canis Major.
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When it is low on the horizon, air turbulence makes it twinkle in many colours.