I am still catching up with reading areas of this website. In light of having read this thread, if you want you can incorporate the Satellite Musings here also, to keep a lower profile as noted in Simon's post above, feel free. Had I got this far, I would have posted here, originally.
As you can imagine, the lack of a propulsion system in order to maintain "stationkeeping" for Hubble, resonates with me. As well as the invincibility of all NASA spacecraft against all parking lot dings and fender benders in the crowded layers below the Van Allen Belts.
Not even a nut or bolt or natural cosmic debris has ever been a problem, it seems. Much less falling fuel tanks, decellerating rockets, satellites, dropped tools, meteors, other rockets servicing the ISS, shuttle missions, satellite launches, and the Hubble. Except when the Russian and US sats collided sending debris all over the place endangering...nothing, I reckon. Whew!
One imagines they have an Orbital Traffic Control tower to handle this : http://www.brighthub.com/science/space/ ... age/78643/
And that's not even talking about the keepers, that's just what they call "junk". lol.
I can't find the satellite map I was using last year. I'll post if I run across it again.