Leon's History Notes

Formation of the universe

Universe formed, matter and stars emerged.

Timeline

  1. ~13.8 billion years ago: Big Bang; universe begins expanding from an extremely hot, dense state.
  2. ~13.6 billion years ago: First stars form; nuclear fusion begins producing heavier elements such as carbon and oxygen.
  3. ~13.5 billion-13 billion years ago: First galaxies form.

Happening elsewhere at the time

Nothing found.

Early Formation series