Wolf 359 is also called Gl 406, and CN Leonis and informally called Proxima Leonis. Third nearest star system to the Sun. It is one of the smallest Red Dwarf stars known and is a flare star and the M6 V spectral standard star. Its proper motion was first measured by German astronomer Max Wolf in 1917. It was the lowest mass and faintest star known until the discovery of VB 10 in 1944. Its temperature is so low that chemical compounds can exist in it, which is rare for a star. It is a relatively young star, less than a billion years old.