Earth’s History Timeline

By audreydong
  • 4600 BCE

    Planetary Accretion

    Approximately 4.6 billion years ago, the solar system was still a cloud of dust and gas called the solar nebula. Then, small particles clump together due to the force of gravity, eventually forming planets like the Earth.
  • 4500 BCE

    Formation of the moon

    Approximately 4.5 billion years ago, a mars-sized planetesimal crashed into Earth. Vaporized chunks of the young Earth was bounded together by gravity, forming the moon.
  • 4000 BCE

    Planetary Cooling

    The Earth cooled from the outside, and the hot core is what allows Earth to be geologically active. Heat can escape from volcanos induced by meteorite impacts.
  • 3800 BCE

    End of Heavy Bombardment

    The Late Heavy Bombardment was a period known for its increased intense impacts in the inner solar system.
  • 1500 BCE

    Core Formation

    The Earth went through a melton stage, where heavier materials such as iron and nickel sank inwards to form the core.