Sirius
Brightest star in Earth's night sky
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Why this is trending
Interest in “Sirius” spiked on Wikipedia on 2026-07-20.
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Key Takeaways
- Sirius is the brightest star in the night sky, located in the southern constellation of Canis Major.
- ' glowing' or 'scorching ' ).
- With a visual apparent magnitude of −1.
- 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.
- 5 astronomical units as they orbit every 50 years.
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Source summary
WikipediaSirius is the brightest star in the night sky, located in the southern constellation of Canis Major. Its name is derived from the Greek word Σείριος (Latin script: Seirios; lit. 'glowing' or 'scorching'). The star is designated α Canis Majoris, Latinized 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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