History of the Earth

By luisa.wang
  • 4600 BCE

    Planetary accretion

    planets are formed when dust, hydrogen, helium and other substances are forced together through gravity.
  • Period: 4600 BCE to 4000 BCE

    Hadean Eon

    It is the time when Earth started to form, until stable continents, the atmosphere, and water existed on the surface of the Earth
  • 4500 BCE

    Earth accretion

    The Earth most likely was accreted through the collision of many particles in space around 4.54 billion years ago, though the exact time is not known.
  • 4500 BCE

    Formation of the Moon

    The planetoid Theia collides with Earth. Its debris collected into the moon.
  • 3900 BCE

    Planetary cooling

    Meteors and asteroids that may have contained water crashes into the surface of the Earth. Over the first billion years, a crust is able to form as the Earth cooled.
  • 3800 BCE

    Late Heavy bombardment

    Jupiter and Saturn moved closer to the inner planets, disturbing the asteroid belt. This causes many space particles to bombard the inner planets.
  • 1000 BCE

    Solid core forming

    Around 1.5 to 1 billion years ago, the Earth forms a solid core.