Is it possible that (re: earth and moon)

[nukeman]

Is it possible that...(re: Earth and moon)

(This is regarding how the moon became apart of our orbit)

Is it not possible that insted of the moon simply crashing into the earth, giving us some of its mass, and the rest just drifts off, gathers and gets caught in our orbit...could it not of been headed on a crash course WITH Earth (both traveling towards our solar system) and met/crashed in our solor system, bouching off each other causing them to dramatically reduce their speed and get caught in the suns orbit, and the moon simply getting caught and pulled in by Earth gravity and sticking it in our orbit?

Anything to really back up my claim? no :) Well, the Earth has a much different interior than mercury and venus, and much larger dense core.

Obvious difference than other plants in our solor system...life (or the environment for life)

Just a thought :)

 

[NobodySpecial]

To change their orbit about the sun - the earth+moon system would have to either gain or lose some orbital angular momentum.
It can't change it's orbit around the sun by simply swapping momentum between the Earth and the moon, it can change the two bodies - but the resulting lump would still go around the sun int he same way.

 

[Silverhill]

Is it not possible that ... the moon ... headed on a crash course WITH Earth (both traveling towards our solar system) and met/crashed in our solor system

Possible, yes, but very unlikely. Objects falling into this system would have a very great speed, which they would have to get rid of somehow in order to be captured by the Sun. Simple collision would not do it, unless the original masses were roughly equal and the incoming velocities were nearly diametrically opposed. The likelihood of this combination of conditions is vanishingly small.

Well, the Earth has a much different interior than mercury and venus, and much larger dense core.

Not very different, in the case of Mercury; see its Wikipedia entry: http://en.wikipedia.org/wiki/Mercury_(planet)#Magnetic_field_and_magnetosphere.
Venus is thought likely to have a reasonably large iron core too, but any of several conditions militate against its ability to have a notable magnetic field. See its Wikipedia entry: http://en.wikipedia.org/wiki/Venus#Magnetic_field_and_core.