Namely, they are not massive enough to start nuclear fusion at their cores. These are brown dwarfs. There are a few thousand known brown dwarfs in the Milky Way and we have never seen any beyond ...

The “first known brown dwarf,” Gliese 229B, always seemed a bit off. Too dim for its mass, it defied expectations. A team of ...

Recent observations, however, reveal that Gliese 229B is actually two brown dwarfs orbiting each other closely, forming a binary system. This was confirmed through studies using telescopes in ...

Vets said the decision to operate was not taken lightly A brown bear is set to undergo brain surgery in what a charity has said is the first operation of its kind in the UK. The Wildwood Trust ...