WASP-12b is an extrasolar planet orbiting the star WASP-12. It is said by NASA the hottest planet in the Universe, much hotter than Venus. It is extremely close to its star, about 2 million miles away from it. It is a gas giant and is bigger than Jupiter. The average temperature
there can get up to 1500 degrees Celsius! For comparison, Mercury in our solar system's average temperature is around 430 degrees Celcius. WASP-12b is so close to its star, that the star sucks mass from the planet creating a comet-like trail behind it.