what is the most known star
Betelgeuse is the brightest star in Orion, and one of the largest known stars with a diameter of roughly 700 times that of the Sun. Orionâs Alpha star is 20 times more massive than the Sun. This red supergiant emits 7,500 times as much energy as the Sun does.nother star found in the constellation Cepheus that is among the largest and most luminous stars in the Milky Way is Mu Cephei. It is a so-called red supergiant star and may be the largest star visible to the naked eye, and possibly, in the whole galaxy.