A bluish-white star in the constellation Canis Major; Alpha (α) Canis Majoris. A vertex of the Winter Triangle and the brightest star in the night sky. It is actually a binary star with a white dwarf companion star
Sirius, a star of the constellation Canis Major, or the Greater Dog, and the brightest star in the heavens; called also Canicula, and, in astronomical charts, α Canis Majoris