Flexi Says: Currently, the largest known star to astronomers is UY Scuti, a hypergiant with a radius around 1,700 times larger than that of the Sun. UY Scuti is located near the center of the Milky Way, roughly 9,500 light-years away. The most massive known star to astronomers is R136a1. This star is located in the Large Magellanic Cloud outside of our Milky Way Galaxy. The mass of R136a1 is about 315 times that of our Sun.
