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Sirius

binary star system in the constellation of Canis Major

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About Sirius

Sirius is the brightest star in the night sky, located in the southern constellation of Canis Major. Its name is derived from the Ancient Greek word Σείριος. The star is designated α Canis Majoris, Romanized to Alpha Canis Majoris, and abbreviated α CMa or Alpha CMa. With a visual apparent magnitude of −1.46, Sirius is almost twice as bright as Canopus, the next brightest star. Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance between the two varies between 8.2 and 31.5 astronomical units as they orbit every 50 years.

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Facts from Wikidata (CC0). Image by Mellostorm via Wikimedia Commons (CC BY-SA 3.0).

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Not who you're looking for? Others named Sirius: stellar god in Greek mythology · urban-type settlement in Krasnodar Krai, Russia · album by Irish folk group Clannad · 1942 film by Dezső Ákos Hamza

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