How was the earth formed?

1 Answer
Sep 17, 2015

Generally speaking the same way the sun formed.


The solar system started as a nebula, or cloud of space gas. Gravity caused the atoms of this gas to coalesces into a core. The remaining material orbited around that core as a big gaseous disk. The inner most gas fell to the core and that is how the sun was formed.

Additional cores were formed over millions of years and around each of these cores new disks of gaseous material and other elements formed. Eventually these fell into the cores and we ended up with planets. The act of fusion, caused by gravity, is what turned a lot of gas and loose heavier atoms, into the iron core the Earth has today.