NASA's Cassini spacecraft has marked its final close pass of the Saturnian moon Dione by capturing the rocky body in a series of stunning images as it sailed past the satellite on August, 17. Cassini had previously visited the moon five times, but had never before captured the moon in so high a resolution.
New images taken from NASA's Cassini spacecraft appear to show unusual redish arcs marking the surface of the Saturn's icy moon Tethys. The strange features cover significant stretches of the moon's surface, and have left astronomers baffled as to their origins.
May 31 saw NASA's
Cassini spacecraft make its last close up pass with Saturn's moon
Hyperion. The moon has a fascinating, almost spongy appearance due to
the fact that its surface is actually less dense than