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Even if Philae's battery runs out of power, the lander will remain in hibernation mode on the comet.

Ulamec said it's feasible Philae would be able to catch enough light to wake up again when the comet gets closer to the sun during its 6.5 year orbit.

\"PHOTO:
Arne Dedert/AP Photo
PHOTO: ESA physicist Matt Taylor shows his 'Rosetta' tattoo at the satellite control center of the European Space Agency (ESA) in Darmstadt, Germany, Nov. 12, 2014.
>

The goal of the ambitious $1.6 billion mission is to glean new insights into comets and other celestial objects -- and answer questions about the origins of life on Earth.

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