On Thu, 3 Feb 2005, Ale[x] Garbino wrote:

> They try to keep Hubble in a "clean" orbit. The ISS orbit is surrounded by 
> junk, gases, etc. And the risk of taking out the station and/or Hubble is 
> high (these things can do orbit corrections; they aren't built with thrusters 
> all over like the shuttle/apollo/gemini and all the stuff that was planned on 
> docking/small precise maneouvers is).
> And moving a large structure like the ISS is very difficult (think of the 
> leverage caused by multi-ton modules being tugged at right angles to each 
> other... 0g, not 0 inertia!!).

It is not reasonable to move the heavy space station to the light 
Hubble. The other way aruond might work, using f.ex. a Progress ship 
docked to the Hubble (can anything dock to it ?). (same as used to boost 
the ISS).

Peter
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