Wasp-12b

Discovered on April 1st, 2008, this giant exoplanet is the hottest planet known to mankind.

Properties
With a surface temperature of 2500 Kelvin (4000 degrees fahrenheit, which is hot enough to melt steel), WASP-12b is the hottest planet in the known universe. A year on this planet is only 26 hours and it is slowly being burned away by its host star, and will be completely demolished in the next 10 million years. All these extreme properties come from how close it is to its host star.