Re: Why the moon keeps the same side toward earth?

"Uncle Al" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> > > junhwi wrote:
> > > > Why the moon keeps the same side toward earth?
> > > > Can we prove that mathemathically?
> > > > And, for same relation - sun and earth - , after so many
> > > > years.. the earth may toward same side to the sun?
> > >

0 "Sam Wormley" <[EMAIL PROTECTED]> wrote in message
0 news:[EMAIL PROTECTED]
0 Ref: http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/980218b.html
0    Most of the satellites in the solar system rotate synchronously like
0    our moon (see http://www.seds.org/nineplanets/nineplanets/luna.html).
0    An example of one that doesn't is Saturn's moon Hyperion. Its rotation
0    is actually chaotic. You can find out more about it at
0   http://www.seds.org/nineplanets/nineplanets/hyperion.html
0   Also, http://www.solarviews.com/eng/data1.htm#orb
0   which is a table of orbital and rotation periods, among other things.
0   Damian Audley and John Cannizzo
0   for Ask a High-Energy Astronomer


> > Uncle Al <[EMAIL PROTECTED]> wrote in
> > message news:<[EMAIL PROTECTED]>...
> > >    1) Lunar orbital locking.
> > >    2) Lunar libration.
> > >    Google
> > >    "lunar libration" 754 hits
> > >    3) Why do you think the side of the moon facing the Earth
> > >    is all smooth (less cratering after the fact), and the side of
> > >    the moon facing away from the Earth is nothing but violently
> > >    craggy topography?
> > >   The Earth-Sun system does not embrace Earth-moon orbital
> > >    conditionsfor obvious reasons.
> >
> John Morriss wrote:
> > I've read that one reason is that the Earth-facing-hemisphere gets one
> > or two lunar eclipses a year.  That increases the thermal cycling and
> > attendant thermal erosion by over 8%;  and the thermal cycling from an
> > eclipse is more abrupt than that from a lunar sunrise/sunset...
> > Any meteorites hitting the Earth-side would have to make a loop around
> > the moon, or skim past the earth.  Calculating the magnitude of this
> > effect is certainly beyond me...    :)
> >
>
> When the moon was semi-molten, all the low mp anorthosite sloshed to
> the front side down the gravity divergence.  The backside then was all
> spikes and dikes of residual high melting stuff already solidified.
> The anisotropy amplifies the orbital locking.
> Uncle Al
>

The Earth/Moon system affects each others body's the tidal sizes of 
molten core, solid mantle, liquid waters and atmosphere (whichever
is applicable) in extremely complicated ways when viewed in detail. 
(even human behavior....so most Sheriffs do attest to. :-) )

What I am interested to hear is whether/which/how the moon's "facing" 
and orbits period was affected/changed when according to the latest 
theory ALL the oceans waters froze, preventing tides from forming, 
and the other extreme case when there was no ice at all and only
one single super-continent as an "island" in one global ocean? 

Did the moon "shake" its face more, then less, back to a fixed "stare" 
during these extremes and did the moon's orbit distance increase and 
decrease? Do we expect a long term, irreversible dampening of these
effects or do we have a system which can oscillate within the same
amplitudes "forever", well, for a few billion years, without loosing
a sizable portion of energy ?
hanson