The Largest Star Known! Stephenson 2-18 is a red supergiant lo | Awesome Science

The Largest Star Known!
Stephenson 2-18 is a red supergiant located in the constellation Scutum. It is the current record holder for the largest star known, with a size 2,150 times that of the Sun. The star is located at a distance of 18,900 light years from Earth. It is a member of the open cluster Stephenson 2. It would have started as a very massive main sequence star, and become a supergiant after the end of core hydrogen burning.