Sirius is in fact a double star , there is a blue dwarf orbiting Sirius which has a lot of mass.

Scientist only discovered it in 1980 / 90 , the light from Sirius is so bright that nobody had discovered it yet.

An ancient Hopi Indian prophecy states, "When the Blue Star Kachina makes its appearance in the heavens, the Fifth World will emerge". This will be the Day of Purification. The Hopi name for the star Sirius is Blue Star Kachina. It will come when the Saquasohuh (Blue Star) Kachina dances in the plaza and removes his mask.