The Sun lives in our Solar System taking up 99.8% of the total mass of the entire solar system! The Sun is actually a very large star. The sun is 1,390,000 km in diameter, it’s mass is 1.989e30 kg.  The temperature of the sun is 5,800 K at the surface, and 15,600,000 K at the core. The sun consists of 70% Hydrogen, 28% helium, and 2% assorted metals.