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Comet-chasing probe sends signal after 'space hibernation'

The European Space Agency's comet-chasing Rosetta probe has sent back a signal after it was woken from its "deep space hibernation" after almost three years.

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ESA says it expects Rosetta signal 'any minute now'

The European Space Agency (ESA) has said it expects to make contact with its comet-chasing Rosetta probe "any minute now".

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