Brown Dwarf Star Is So Small It Could Be a Planet, Plus a Molecule That Shouldn't Be There

It's impossible to tell for sure how many stars there are in the Universe for the simplest reason that it's impossible to see them all, let alone count them. Some estimates, based on, well, more or less guessing, put the number at 200 billion trillion. Do you find that something hard to grasp? You're not the only one. Although there is no way of telling how many stars there are, we know the most important types. Depending o... (continue reading...)