Hello DAVID,

On Friday March 28 2008 09:55, you wrote to me:

 DW> -> Indeed. Other satellites however can appear to move in retrograde
 DW> direction  -> then the more general case applies.

 DW> "Can", yes. It's unusual, though. Most satellites are in prograde
 DW> orbits, to save fuel at launch, and are lower than the geosynchronous
 DW> orbit. So they overtake the earth's rotation.

Well, that is the scientist in me. Scientists do not stop at
"most". They keep pushing that "what if" button... ;-)


Cheers, Michiel

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