Those Three Intrepid


Pan, a ball of rock twelve miles thick, can with its gravitational wake push aside Saturn's rings; traveling through a lane known as Encke's Gap. The Cassini spacecraft sends us photographs of that and other places in the Saturnine system.

Millions of miles away, NASA's Martian rovers have earned their place in this month's issue of National Geographic, whose online, condensed story includes a link to Jet Propulsion Laboratory's rover traverse maps.

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