Big Bang Theory Facts



  • The Big Bang explosion is how scientists think the Universe began some 15 billion years ago.
  • First there was a hot ball tinier than an atom. This cooled to 10 billion billion °C as it grew to football size.
  • A split second later, a super-force swelled the infant Universe a thousand billion billion billion times. Scientists call this inflation.
  • As it mushroomed out, the Universe was flooded with energy and matter, and the super-force separated into basic forces such as electricity and gravity.
  • There were no atoms at first, just tiny particles such as quarks in a dense soup a trillion trillion trillion trillion trillion times denser than water.
  • There was also antimatter, the mirror image of matter. Antimatter and matter destroy each other when they meet, so they battled it out. Matter just won – but the Universe was left almost empty.
  • After three minutes, quarks started to fuse (join) to make the smallest atoms, hydrogen. Then hydrogen gas atoms fused to make helium gas atoms.
  • After one million years the gases began to curdle into strands with dark holes between them.
  • After 300 million years, the strands clumped into clouds, and then the clouds clumped together to form stars and galaxies.
  • The afterglow of the Big Bang can still be detected as microwave background radiation coming from all over space.