Energy makes the world go 'round! No, this is not just a fun or creative statement. It's actually true. Gravitational energy is what causes the earth to spin on its axis. Of course, gravitational energy is just one of the many forms of energy present in the universe. There's also solar energy, which comes from the sun, and kinetic energy, the form of energy possessed by any object in motion. We could go on naming types of energy all day, but we suspect you want to know a little more than this. That's why we created this website: to teach you all about energy.