Ooh, I didn't know Enceladus was next on the list! Awesome! Enceladus is the shiniest object in the solar system, with an albedo close to 1 -- pure white. It would be very interesting to see if it's got an ocean, although I doubt it'll be as significant as Europa's ocean. Enceladus does have grooves similar to those seen on Europa, but it also has a lot more craters, so its surface is older. In some respects, it looks more like Ganymede, except that it is much smaller (it's smaller than Europa as well) and seems to have very little rock.<br /><br />What's really interesting is that there are grooves that cut *across* cratered terrain, wiping craters out. So there has been reshaping since the impacts. And the impacts aren't all that old either. Compare the light, crisp craters on Enceladus with the many deformed and decayed craters on Iapetus. So this should be very interesting. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>