Where does all of the suns energy come from? We know it shines and heats the earth but do we know how? And why doesn’t the sun just go out?
Most of the sun is made up protons, which are positively charged particles. These will always repel each other when they get close, however, sometimes two protons are moving so fast they will collide and in doing so they will both lose mass and release a large amount of energy.
So what happens with the suns energy? When two protons collide one is converted into a neutrino and they will stay stuck together until another proton collides and attaches. When 2 of these compounds collide two protons are lost, leaving two protons and two neutrinos. Essentially changing hydrogen to helium, amazing!
The sun loses about 4.3 Billion Kg of mass every second through these collisions, and as we know mass is converted to energy by multiplying it by the speed of light squared (E=mc2). So every second the sun is producing an inconceivable amount of energy and using that to keep us alive!