Sirius is a binary star system consisting of two white stars orbiting each other with a separation of about 20 AU [e] (roughly the distance between the Sun and Uranus) and a period of 50.1 years.

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. It has a radius 1.71 times that of the Sun and a …

Feb 27, 2025 · It is the brightest star in the constellation Canis Major, the Great Dog. The Sirius star system is the fifth nearest star system to Earth. Sirius A is the seventh individual nearest …

Aug 20, 2025 · Sirius is the closest example of a binary system with a white dwarf, making it a valuable laboratory for studying stellar evolution, mass–luminosity relationships, and the …

Sirius is a binary star system. The primary star is Sirius A, a main-sequence star of spectral type A0 or A1, and the companion star is a faint white dwarf star, designated Sirius B.

What type of star is Sirius? Sirius is known as a binary star system. Although visually it looks like one star, Sirius actually consists of two stars that are very close together, known as Sirius A …

In actual fact, Sirius A has a companion star, the white dwarf Sirius B, which rotates around their center of common mass once every 50 years. However, it is around 10,000 times fainter than …

Dec 13, 2005 · Sirius A, only 8.6 light-years from Earth, is the fifth closest star system known. Sirius B, a white dwarf, is very faint because of its tiny size, only 7,500 miles in diameter.

Mar 14, 2025 · Sirius is not just one star but a star system with two stars: Sirius A, the brightest star in our night sky, and Sirius B, a faint white dwarf. They orbit a common center of mass, …

Oct 27, 2024 · Sirius is a binary star system consisting of Sirius A and its lesser-known companion, Sirius B. The existence of Sirius B was first hypothesized in 1844 by German …