Uy scuti

UY Scuti is the largest known star to exist.

 UY Scuti is the largest star ever discovered. It is located in the Milky Way galaxy. Its diameter is about 2,377,536,000 km, and has a solar radius of 1,708 times as our sun. Its expanding mass cloud reach beyond into the orbit of Jupiter. Its whole mass will be about 15.9 AU=Astronomical Units across. UY Scuti's distance is around 9500 light years from Earth.