The sun is the hottest thing ever known. The temperature is 55000c. It is 4.6 billion years old and weighs 1,989,000,000,000,000,000,000,000 billion kg. The sun is a star and is a huge ball of very hot glowing gas like other stars. Once a month the moon passes between earth and the sun. The energy created by the suns core is nuclear fusion. It takes 8 minutes for sunlight to reach earth. The sun has a powerful magnetic field. It was originally named Sol then it was changed to sun. The sun is really hot and your eyes can get sunburned. A bolt of lighting is 5 times hotter than the surface of the sun.The sun is the most perfectly round object known in the universe. The earths core is about as hot as the sun. All nine planets go around the sun. There are spacecrafts observing the sun right now.