rootninja

Our Sun is a gigantic sphere of hot boiling hydrogen. Ok, you probably already knew that. But did you know that it is not on fire? It only appears bright to our eyes because it is hot. The sun is not on fire because:

Fire is: the rapid oxidation of a combustible material releasing heat, light, and various reaction products. Fires start when a flammable and/or a combustible material with an adequate supply of oxygen or another oxidizer is subjected to enough heat and is able to sustain a chain reaction. This is commonly called the fire tetrahedron. Fire cannot exist without all of these elements being in place (though as previously stated, another strong oxidizer can replace oxygen).

The energy source of our Sun is nuclear fusion of hydrogen, resulting in helium, within the sun’s core.