History of the Earth

By suhyun Han
  • 4600 BCE

    Planetary Accretion

    Planetary Accretion
    Planetary accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, in an accretion disk.
  • 4600 BCE

    Accretion Disk

    Accretion Disk
    While Accretion Disk keep rotating, many large rings are formed. Each ring was combined with numerous small celestial body and started to revolve around the Protosun.
  • Period: 4600 BCE to 4600 BCE

    Formation of the Earth

    Crashing with other celestial bodies, the Earth finally formed
  • 4500 BCE

    Planetary Cooling

    Planetary Cooling
    Planetary Cooling is whether the body is a planet or a moon, has to cool off. The warmth contained inside a body controls what sort of surface activity, atmospheric activity, and interior activity which the body has.
  • 4500 BCE

    Formation of the Moon

    Formation of the Moon
    Still not clearly known, but there are many theories about the formation of the Moon. Among these, the most reasonable hypothesis suggests that the Moon formed out of the debris left over from a collision between Earth and an astronomical body 
  • 4500 BCE

    Magma and Ocean Formation

    Heat from the collision between celestial bodies let the Earth melting and eventually formed magma and ocean
  • 4500 BCE

    Primitive crust and mantle formation

    As the collision of the planet bodies decreased, the surface was cooled and a hard crusts were made.
  • Period: 4500 BCE to 3800 BCE

    End of Heavy Bombardment of the Earth

    Near the end of the violence, during a period known as the Late Heavy Bombardment, impacts in the solar system may have increased.
  • 1500 BCE

    Core Formation

    Core Formation
    The Earth inner core was formed about 1~1.5 billion years ago. Relatively variable materials such as silicon and oxygen have formed to form the mantle, while relatively heavy materials such as iron and nickel have moved to the core and formed nuclei.
  • 400 BCE

    The Birth of the Live Creatures

    The Birth of the Live Creatures
    The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.