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. |
Pulled from your page:
The current preferred hypothesis regarding the Moon?s formation is the ?collision? theory. It is, so far, the best at explaining how compositions of rock from the Earth and rock from the Moon differ. According to the collision theory, at the dawn of the Solar System a heavenly body the size of Mars hit the young Earth. As a result, material from the rocky mantle of the heavenly body and of the Earth was hurled into space. This collected in the shape of a ring on a path closely orbiting the Earth where it then gradually ?clumped together? to form the Moon.
It had formed rock and the impacting planet is sort of unknown. The picture on that page I think goes with the liquid theory of it being a droplet that spilled outward.
Like I said it had cooled. Now I did not mean to the point it is now.
I do see you clear it up some. I think we mean the same thing, I just am willing to think there could of been water on one of the sources. I am pretty sure the impact liquefied the entire planet (check my link and the pic). This would of again melted the iron core. Do not know why you think it would stop the rotation. It was not a direct hit either. Again I think everything kept spinning, the heavy metals would of again sunk to the core and settled. The moon did the same but was mostly just rock and cooled entirely much faster (cooled to the point of no core or little core).
I also do not know why you think there could not of been water, vapor, or the compounds needed to allow it to form with cooling. Then I have read a bunch about extremeophiles (spelling) which is life that before we found we figured could not exist. Living in stuff like pure chemicals, unbelievable heat and chemicals, living of of chemicals instead of photosynthesis, and things like that.
I do know most of the other stuff is theories which I do accept and that is why I do allow some imagination and I do my best to keep it clarified.