Time running out on comet lander

Time is running out for the Philae comet lander. The latest attempts to communicate with the probe have failed. And with temperatures plummeting as the comet races from the sun, it will soon be too cold for the robotic explorer to keep its computer running. On January 10, engineers sent a command to spin Philae’s reaction wheel, which helped stabilize the lander during its descent. They hoped to nudge the lander into sunlight or at least shake several months of comet dust off its solar panels. Philae did not respond.…

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