(urth) Cumaean???

[Jeff Wilson]

Pedro Pereira wrote:

> I dont know either, but it seems to me that that limit would be met 
> before geting so close that the atmospheres would touch (as is told in 
> the Book of the Short Sun). 

Not necessarily. Being fluid, the atmosphere is subject to positive 
feedback in that the tidal forces cause it to rise in a bulge, getting 
closer to the primary and thus being subject to stronger tides that make 
it bulge still more, etc.

The point is moot WRT to the moon; its "atmosphere" is a remnant, 
transitory puff of gas that was replaced twice over by exhaust from the 
Apollo landings.

-- 
Jeff Wilson - jwilson at io.com
< http://www.io.com/~jwilson >