Beta Canis Majoris (β CMa, β Canis Majoris) is a star in the southern constellation of Canis Major, the `greater dog`, and is located at a distance of about 500 light-years (150 parsecs) from the Earth. In the modern constellation it lies at the position of the dog`s head. It has the traditional name Murzim, Al-Murzim or Mirzam, which is deri......