Sirius (the
Dog Star) is the brightest
star in the night sky and is located in the constellation
Canis Major. At a distance of 8.6 light-years, Sirius is also one of the nearest stars to the Earth (see
Star/Nearest). It is a main sequence star of spectral type A0 or A1 and has a mass about 2.4 times that of the
sun.
Sirius has a white dwarf companion which orbits it with a period of just over 50 years.
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