-
A nearby star explodes, causing a gas cloud to collapse and form into the sun. For the next 100000 years, dust particles collide with each other to form clumps up to 1 km wide.
-
The clumps previously formed collides into each other, forming planets. The outer planets are larger because it is colder, making it more efficient for these clumps to stick to each other.
-
The moon was formed at this time. It is believed that a giant mars-sized object crashed into the earth, causing a massive chunk to fly off and become the moon.
-
Pluto-like objects crash into the earth, depositing metals.
-
Speculated that during this time, Jupiter and Saturn migrated into the inner solar system and cleared out a lot of objects. Eventually then went back to the outer solar system. Comets that carried water also could have hit the Earth during this time.
-
Heat from inside the Earth tried to escape, creating techtonic plates, spin and its magnetic field.