The exoplanet known as HD 149026b is the hottest of all known worlds, with temperatures reaching 3,700 degrees Fahrenheit. It emits so much infrared heat that it glows. Located 279 light-years from Earth, the gas giant orbits very close to its sun. Hotter than some stars, it's "simply the most exotic, bizarre planet," said physics professor Joseph Harrington. For more, visit Space.com(1).