Astronomy Picture of the Day has a picture of Verona Rupes on Miranda today:
http://apod.nasa.gov/apod/ap110404.html
They suggest that it might be possible to jump from this 20 km cliff in the weak Mirandan gravity, ending up moving att 200 km/h and then surviving impact by using an airbag. Sounds like fun!
What else is there to do among the Uranian moons?
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