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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.
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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.”.
Feb 2, 2024 · The position of Sirius is RA: 06h 45m 08.9s, dec: -16° 42′ 58″. Bottom line: Sirius is the brightest star in the night sky as seen from Earth and is visible from both hemispheres.
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