Sirius

n. (Astronomy) brightest star in the sky which is part of the Canis Major (southern constellation), Canicula, Dog Star

Sirius (α CMa / α Canis Majoris / Alpha Canis Majoris) is the brightest star in the night-time sky with a visual apparent magnitude of −1.47. It is also known as the "Dog Star"; its constellation, Canis Major (English: Big Dog), is named after it. What to the eye appears as a single star is actually a binary star system, consisting of a white main sequence star of spectral type A1V, named Sirius A, and a faint white dwarf companion of spectral type DA2, named Sirius B. The reason for its brightness is not its intrinsic luminosity but its closeness to earth; at a distance of 2.6 pc or 8.6 light years, Sirius is one of our near neighbours. Sirius A is only about twice as heavy as the Sun and, with an absolute magnitude of 1.42, is far less bright than Canopus or Rigel.
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"SIRIUS" redirects here. For other uses, see Sirius (disambiguation). Sirius Satellite Radio is one of two satellite radio (SDARS) services operating in the United States and Canada, along with XM Satellite Radio. Headquartered in New York City, with smaller studios in Los Angeles and Memphis, Sirius was officially launched on July 1, 2002 and currently provides 69 streams (channels) of music and 65 streams of sports, news and entertainment to listeners. Music streams on Sirius carry a wide variety of genres, broadcasting 24 hours daily, commercial-free. A subset of Sirius music channels is included as part of the Dish Network satellite television service. Sirius channels are identified by Arbitron with the label "XS" (e.g. "XS120", "XS9", "XS17").
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Noun
1. the brightest star in the sky; in Canis Major
(synonym) Dog Star, Canicula, Sothis
(hypernym) binary star, binary, double star
(member-holonym) Canis Major, Great Dog

n. Sirius (Astronomy) brightest star in the sky which is part of the Canis Major (southern constellation), Canicula, Dog Starr

n. Sirius, Dog Star (Astronomy)