To estimate how close a supernova would have to be to cause serious damage to Earth, we must first look at a supernova's ...

One of the largest known stars, UY Scuti is a red supergiant with a radius 1,700 times that of the Sun, located 9,500 light-years away. Known as “Herschel’s Garnet Star” due to its red hue, Mu Cephei ...