Brown Dwarfs are Hybrids of Large Planets and Small Stars

When is a star also a planet? Apparently, when it's a brown dwarf. For years, astronomers have known about a class of tiny stars they called brown dwarfs (named this because they're unusually small and dim compared to most stars). But new research confirms that the stars are planet-sized---and also planet-like. Brown dwarfs, as you may have gathered, are weird objects. They share characteristics with gas giant planets as well as tiny stars, and even though astronomers have found dozens in