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The nearest known white dwarf is Sirius B, at 8.6 light years, the smaller component of the Sirius binary star. There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun. [2] The unusual faintness of white dwarfs was first recognized in 1910. [3]: 1 The name white dwarf was coined by Willem Jacob Luyten ...
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.
Nearest white dwarf: Sirius B: 1852 8.6 light-years (2.6 pc) Sirius B is also the second white dwarf discovered, after 40 Eridani B. [9] [25] [26] Nearest brown dwarf: Luhman 16: 2013 6.5 light-years (2.0 pc) This is a pair of brown dwarfs in a binary system, with no other stars. [27] Nearest Luminous Blue Variable: P Cygni: 5,251 light-years ...
The well-known binary star Sirius, seen here in a Hubble photograph from 2005, with Sirius A in the center, and white dwarf, Sirius B, to the left bottom from it. A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other.
The closest encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. [4] It is currently predicted to pass 0.1696 ± 0.0065 ly (10 635 ± 500 au) from the Sun in 1.290 ± 0.04 million years from the present, close enough to significantly disturb the Solar System's Oort ...
Sirius B: 1852 Sirius system Sirius B is also the nearest white dwarf (as of 2005) [1] [2] First found in a binary star system First double white dwarf system LDS 275: 1944 L 462-56 system [3] First solitary white dwarf Van Maanen 2: 1917 Van Maanen's star is also the nearest solitary white dwarf [4] First white dwarf with a planet WD B1620− ...
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Alvan Graham Clark was born in Fall River, Massachusetts, the son of Alvan Clark, founder of Alvan Clark & Sons. [1]On January 31, 1862, while testing a new 18.5-inch (470 mm) aperture great refractor telescope in Cambridgeport, Massachusetts, Clark made the first ever observation of a white dwarf star.