A well-studied cosmic object has stunned astronomers. The "failed star" Gliese 229B has been revealed to be two so-called ...

Discovered in 1994, Gliese 229 B was the first confirmed brown dwarf, identified in orbit around a red dwarf star. Its ...

It orbits so close to its host star that gravity squeezes what should be steam into an absurd, exotic ice crust. Its name is Gliese 436 b. As interesting as planets made of boiling ice or diamond ...