it's all to do with the relative size and resolution -as Kags says the hubble would get a good picture of the moon but nowhere near enough resolution to detect objects (thanks Kags i thought this was the reason but there are so many
-ve vibes on AB these days i thought i wouldn't post without being sure). If you find this hard to believe cap'n, then consider the perspective of a satellite, which is powerful enough to read a newspaper in someone's hand (apparently). the satellite is only a few (50-100?) miles up however, so consider how much more powerful it would have to get, to get the same level of detail on the moon which is 3 million (or 5 million?) miles away. The only way (IMHO) to get the detail you require would be to send a hubble-type probe close to the moon and i guess they don't want to waste all the money that would be required to do so, for such a trivial task (in their opinion). Anyway aren't the Yanks planning to resurrect the moon landing program again? you'll be able to get all the pics you want then