Jan 23, 2008 13:59
This is the gist of what I learned from TV:
Stars live really long lives and then they die. In the beginning, they are fueled by hydrogen atoms moving fast and burning. Then, the hydrogen atoms get moving really fast and collide with each other, which forms helium (hydrogen is the first element, helium is the second). This happens throughout the star's life and it basically keeps making elements when other elements collide. When certain stars die, they end in these massive explosions, and these explosions create even more elements, including the heavy elements like iron. So when they explode, they send all the elements out into space. Our bodies are made out of these elements created by exploding stars. We, essentially, are stardust.