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Period: 1500 to 1000
Core Formation
Earth's core is formed during accretion when metals and minerals sink through its magma ocean and into the center. The metals and minerals come from astroids and space debris when they crash into the planet. -
Period: to
End of Heavy Bombardment
Heavy bombardment corresponds to the time period between 4.5 - 3.8 billions years ago, when there was a increase in the frequency of colliisions of smaller astroids and planetoids with larger ones. -
Formation of Moon
The moon formed around 4.5 billion years ago, when a collision happened between earth and a planetoid the size of mars. One of the debris that was thrown into space and became the moon. -
Period: to
Planetary Accretion
This is the formation of our planet. Earth formed when gravity pulled gas and dust together to form a giant planet. It is the third planet from the Sun. -
Period: to
Planetary Cooling
After a planet forms, it will keep on cooling down until it runs out of temperature and eventually dies. Around 4.5 - 3.8 billion years ago, Earth became a planet with a hardened shell. Around 3.5 billion years ago, Earth cooled to the point of becoming habitable by life.