The sun is the star at the center of the solar system, it is a really hot ball of plasma, reaching a surface temprature of 5,600 Celcius and 10,000 Fahrenheit, while the core can reach up to 15,000,000 Celcius and 27,000,000 Fahrenheit!, it's inflated and heated by nuclear fusion reactions at its core, 73% of the sun's mass is made up of hydrogen while 25% made up of helium and the other 2%, is made up of oxygen, carbon, neon and iron. The sun is a G2V type star, or a yellow dwarf, it formed ~4.6 billion years ago, that's almost as long as how long we've been waiting for Yandere Simulator to release fully!,