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Is A Collision Responsible For Moon Formation ?

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Posted by Pierre Bon on October 25, 2001 10:11:24 UTC

I'm amazed that Moon formation by collision is accepted by so many scientists.
I thought that a mecanism should rule satellites creation
and be valuable for Giant planets' satellites courtroom
as well as for Earth and Moon and Pluto and Charo.
I read results of the collision theory studies,
and it requires for the collider planet such precise mass, speed and trajectory
that it should really not be a frequent event,
but if collision should also explain Pluto and Charon,
it would become a kind of statistic miracle.
And collision cannot work at all to explain Gaz Giants satellites.
---------------------------------------------
=>If protoplanets have been accreted at very high temperature (>6000)
a mecanism can allow satellite creation :
When a protoplanet cools down
=>if a major constituting element of it
turns from a gaz to a liquid
then, part of protoplanet volume should collapse,
and accelerate its rotation move.
=>If rotation speed is accelerated enought,
"drops" of protoplanet can be centrifugated
and can either escape the protoplanet or be satellised.
Collapse of volume could also be due to chemical reactions.

Therefore, even if this mecanism requires
changes in Solar System scenario history
I shall not trust collision as being responsible
for our Moon birth...
for scission is a more "economic solution"

Thanks for objecting...


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