SUMMARY: NASA's Spirit rover made a slight correction to its trajectory on December 26, when it fired its thrusters for 3.4 seconds. The maneuver went flawlessly, and put the lander right on course to land in Mars' Gusev Crater on January 4 at 0435 UTC (11:35 pm EST January 3). This was Spirit's fourth trajectory correction maneuver since its launch on June 10, and two more might still happen in the final days if its flight is a little off-target. As with Beagle 2, the most dangerous part of the mission will happen when the rovers have to pass through Mars atmosphere and land safely on the planet.

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