WISE finds coolest brown dwarfs ever seen!

How cool is this? Literally, the coolest: NASA's Wide-field Infrared Survey Explorer has found the lowest-temperature brown dwarfs ever seen, the tail end of the stellar class of brown dwarfs called Y dwarfs. How not hot are they? This one (called WISE 1828+2650 if you're playing brown dwarf bingo), spotted by WISE, has a surface temperature of 25° Celsius -- that's 80° Fahrenheit!