Spirit signs off

SpiritNASA’s Spirit Mars rover makes its last contact with ground controllers on Earth. With the Martian winter fast approaching, and the rover’s wheels leaving it stuck in an unfavorable position to keep its solar panels angled toward the sun, Spirit gradually loses power until it shuts off, its mission having lasted nearly seven and a half years – almost 30 times its original design and mission lifespan of 90 days. Spirit’s ground controllers are reassigned to either Opportunity (which is still mobile and operating) or the upcoming Mars Science Laboratory Curiosity rover mission.

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