The Sun has been producing lite for close v billion years simply where does all its unloose energy come upward from? The most mutual consider is that the Sun is burning gas – similar a giant fireball inwards the sky. If this were true, the Sun would accept gone out long ago. So how is the Sun genuinely fuelling itself? It is converting its ain volume into energy. By combining protons (the nucleus of hydrogen) into helium, it squeezes around volume into unloose energy – 4.3 billion kg per second. It is Einstein’s famous E=mc^2 which gives us the quantitative human relationship betwixt volume in addition to energy, where c is the speed of light.