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.