TrES-4 is an exoplanet. It orbits around the star GSC 02620-00648. The planet is 4.5 million miles from its sun. Being this close to its sun, the year on TrES-4 about three days long. This makes the temperature on the planet very hot. In fact, the temperature on TrES-4 is about 2,300 degrees Fahrenheit (1,260 degrees Celsius).