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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.
Oct 24, 2023 · Sirius is the closest star that's more massive and a lot more luminous than our sun. Just as important, Sirius has the closest-known "white dwarf," a stellar "corpse," as a binary...
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Jun 10, 2024 · Sirius, brightest star in the night sky, with apparent visual magnitude −1.46. It is a binary star in the constellation Canis Major . The bright component of the binary is a blue-white star 25.4 times as luminous as the Sun .
Sirius is known for being the brightest star in the night sky and is nearly twice as bright as the next brightest star, Canopus with a magnitude of -1.46. Sirius is also known as the ‘ Dog star ’ because it is part of the constellation Canis Major, which is Latin for “the greater dog.”.
