Quote:
Originally Posted by Darkland
I am a huge science/astronomy geek and I am not sure where you got that info but some of it is incorrect. The earth most definitely was not cooled at the time of the impact, if indeed that impact even occurred. Earth was still very young, very hot and more than likely had not even an atmosphere let alone water. Water came much later when the earth began cooling and planetary degassing allowed for the formation of our atmosphere.
The earth at best had a very thin mantle or crust but mostly magma in motion. This is what allowed the core of the object that struck the earth to merge with the earths as well as allowing the earth to coalesce back into it's former shape much faster.
If the earth had cooled and an object that size had hit us, nothing would ever evolve on this planet. The kinetic energy of the collision alone would stop the core rotation and leave us a dead planet like Mars. No core rotation, no electromagnetic shielding, no electromagnetic no protection from solar winds, ultraviolet radiation, gamma radiation, and other harmful particles that would destroy any lifeform.
http://spacefellowship.com/2009/07/1...-moon-created/
Check out the photo on that link to see what the earth looked like at the time of the proposed collision. |
All the elements were already here for water, from day 1, and was producing water, steam, etc from day 1.
The moon size, its land mass is the size of Africa, it's not as big as some people think. It's age is about the same age as earth, so it's extremely safe to assume the moon was created by an impact or it is the object that hit us.
Then again, that far back we were getting hit with moon sized objects every day..
For all we know, the impact of the moon is what got it earth moving.
The ice is simple... it's in space.