- #1
conan
- 14
- 0
Hi,
I have recently been reading that the currently favoured theory for the origin of the moon is that a Mars sized object smashed into an almost finished earth, ripped off large parts of proto-Earth's mantle and the result debris coallesced into the Earth and moon again.
I know the universe is big and 4 billion years is beyond human comprehension, but boy, that does seem like a bit of jolly good luck to me.
a) First of all that two such large bodies were in the same vicinity of each other
b) That the they clipped each other and didnt bang into each other like marbles
c) That the core that banged into us stayed around and didnt bugger off somewhere else
d) That the Earth's orbit was pushed towards the sun or made elongated
e) That the resulting debris coallesced back around these two large bodies and didnt get smacked into other orbits.
f) That the mass of the two large space bodies was right just after to the collision to form bodies that would orbit each other and then later after the coallescing, still just right to orbit each other.
As far as I've read, the main reason for this theory being preferred over co-forming is the large angular momentum of the Earth moon system. But like I said 4 billion years is a long time and who knows how many collisions we've had in this time with other solar systems, or for that matter, what the energy level was in the forming universe.
Anybody else there find this collision theory just a little too convenient?
conan
I have recently been reading that the currently favoured theory for the origin of the moon is that a Mars sized object smashed into an almost finished earth, ripped off large parts of proto-Earth's mantle and the result debris coallesced into the Earth and moon again.
I know the universe is big and 4 billion years is beyond human comprehension, but boy, that does seem like a bit of jolly good luck to me.
a) First of all that two such large bodies were in the same vicinity of each other
b) That the they clipped each other and didnt bang into each other like marbles
c) That the core that banged into us stayed around and didnt bugger off somewhere else
d) That the Earth's orbit was pushed towards the sun or made elongated
e) That the resulting debris coallesced back around these two large bodies and didnt get smacked into other orbits.
f) That the mass of the two large space bodies was right just after to the collision to form bodies that would orbit each other and then later after the coallescing, still just right to orbit each other.
As far as I've read, the main reason for this theory being preferred over co-forming is the large angular momentum of the Earth moon system. But like I said 4 billion years is a long time and who knows how many collisions we've had in this time with other solar systems, or for that matter, what the energy level was in the forming universe.
Anybody else there find this collision theory just a little too convenient?
conan