Our SUN is of average sise compared with other stars in the universe . However , it is the largest star in our galaxy , estimated to be 110 times larger than the Earth . In the universe , there are stars that are much larger than the Sun and so massive that if they were placed in our solar system , they would exced the orbite of Saturn . In order of size in relation to the Sun , they include Sirius , Pollux , Acturus , Rigel , Adesbaran , Betelgeuse and Antares . Let ' s take a look at some of these stars and their characteristic . SIRIUS . It is the brigtest star in the sky and the main star of the Big Dog constellation . At a distance of 8 . 6 light-years from the Sun , it is one of the closest stars to us . Compare with the Sun , it is 1 . 8 times larger and has 2 . 3 times more mass . With a temperature of 10000 , degres Celsius , it gives off a high level of energy that , through a physical phenomenon , gives it its bluishe hue . As for its luminosity , it is 25 times that of the Sun . POLLUX . With its yellow-orange hue , this geant star is located in the constellation of Gemini . Its colour is thought to be due to the content of elements heavier than helium . It is located 33 . 7 light years from Earth and its volume is 10 times that of the Sun . Its radius is 8 . 8 times greater than the solar radius . It is 700 million years old (compared with 5 billion years for the star in our system ) . It has leaves its main sequence and started to grow .
