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Rover Family Portrait
A comparison of sizes for the Sojourner rover, the Mars Exploration Rovers, the Phoenix lander and the Mars Science Laboratory.
Sojourner landed on Mars in 1997 and the twin Mars Exploration Rovers landed in 2004. Pheonix is scheduled to land on May 25, 2008. Mars Science Lab is scheduled to launch in 2009.
Image Credit: NASA/JPL-Caltech