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Now's a great time to break out that backyard telescope. Because Saturday, March 3, is the Mars Opposition . It's one of the times that the Earth and Mars pass the closest to one another

This month NASA plans to launch its latest and most sophisticated mission ever to the Red Planet: the Mars Science Laboratory. After a dramatic landing in Gale Crater using a skycrane for the final descent, the nuclear-powered rover will drive around one of the richest deposits of clays and sulfates on the planet--the remains of a water-rich era when rivers carved out valley networks. The size of a small car, the rover (named Curiosity) will spend a Martian year exploring the base of the central peak in the crater, thought to be the oldest section