Earth's History

By ericliu22
  • Planetary Accretion (Date shown is 10^-8 of actual date)
    45 BCE

    Planetary Accretion (Date shown is 10^-8 of actual date)

    The attraction of various particles forming a massive object such as planets, solar systems, or even galaxies. In this case, the planet known as Earth was formed.
  • Period: 45 BCE to 38 BCE

    Planetary Cooling (Dates shown are 10^-8 of actual dates)

    It was around this time that the Earth was almost fully accumulated. It was then that the planet's surface which was incredibly hot at the time started to cool down. Large amounts of magma and neighboring asteroids, meteors and comets helped in forming the outer core of the planet.
  • Moon crashing in to the earth (date is 10^-8 of actual date)
    43 BCE

    Moon crashing in to the earth (date is 10^-8 of actual date)

    Around 200 million years after the accretion of the planet, a mini-planet had crashed into the Earth. The word 'crash' is inaccurate it was more a hit obliquely. The debris that fell off the earth when this mini-planet collided with earth added on to the mass of the mini-planet. The mini-planet then got caught into earth's orbit and we now call this mini-planet the Moon.
  • Period: 41 BCE to 38 BCE

    End of Heavy Bombardment

  • Period: 15 BCE to 10 BCE

    Core Formation (Date shown is 10^-8 of actual date)

    The core is made of a ball of iron the size of Pluto. This is backed by the idea that earth has a magnetic field