[extropy-chat] Astronomical question

[Mike Lorrey]

One issue to consider is that there is a smidgen more angular momentum
in the earth in that the core rotates one more rotation per year than
the mantle. The differential effect of these two layers on each other
applies an additional torque beyond just that imposed by the sloshing
of the oceans.

--- Ian Goddard <iamgoddard at yahoo.com> wrote:

> --- spike <spike66 at comcast.net> wrote:
>  
> > This is not right.
> > 
> > 
> > >  The Oxford Dictionary of Astronomy [...]
> > >
> > > "A new process will then begin in which the
> > > Sun's tide-raising power takes angular momentum
> > > from the Earth-Moon system. The Moon will then 
> > > spiral in closer to the Earth until it is torn 
> > > to pieces when it enters the Earth's Roche 
> > > limit." (page 461)
> > 
> > 
> > I have checked my calcs and I can't find the error.
> > The sun tide effect is not sufficient to draw the
> > moon all the way back down to the Roche limit, not
> > even all that close.  
> > 
> > Anyone else calc differently?
> 
> 
>  I'd presume someone has gotten different results. The
> author of the text is Ian Ridpath, whom you can
> contact at (ian at ianridpath.com). It might be worth
> it to run your analysis past him to see what's up.
> 
> ~Ian
> 
> 
> 		
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=====
Mike Lorrey
Vice-Chair, 2nd District, Libertarian Party of NH
"Necessity is the plea for every infringement of human freedom.
It is the argument of tyrants; it is the creed of slaves."
                                      -William Pitt (1759-1806) 
Blog: http://www.xanga.com/home.aspx?user=Sadomikeyism

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