History of the Universe

By bkrodgers
  • The Big Bang

    The Big Bang

    13.8 billion years ago, the Universe began as a single point, which rapidly expanded.
  • Basic Elements Form

    Basic Elements Form

    3 seconds after the big bang, the nuclei of H and He started forming.
  • Radiation Era

    Radiation Era

    10,000 years after the Big Bang, the Universe was mostly radiation (pure energy)
  • Matter Era

    Matter Era

    300,000 years after the big bang, the universe had cooled and expanded enough for actual H and He atoms to form.
  • The First Star & Galaxies

    The First Star & Galaxies

    300 million years after the Big Bang, the H and He gas condensed and formed the first stars.
  • Our Sun Forms

    Our Sun Forms

    9 billion year after the Big Bang ( 4.8 billion years ago), our star formed.
  • The Earth Forms

    The Earth Forms

    9.3 billion years after the Big Bang, our little planet formed. (4,5 Ba)
  • Earliest Life Begins

    Earliest Life Begins

    10 billion years after the Big Bang, the earliest living things evolved on Earth.