Astronomers have found a stormy dark spot on a small star.
Northern Lights on a Distant World
Brown dwarfs are like the Pluto of stars. New research published in Nature points to a more planetary nature by discovering bright aurora on a brown dwarf.
Brown Dwarf Desert
A brown dwarf is larger than a planet, but not large enough to be considered a star. Stars undergo fusion in their cores, but a brown dwarf lacks the mass necessary to initiate fusion. At the same time, they are more like stars than planets, and can have at atmospheric temperature of 2000 K. So these objects occupy a middle ground between star and planet.