Financial Express | Comet-chasing probe wakes up, signals Earth Financial Express Systems had been powered down in 2011 to conserve energy, leaving scientists in the dark about the probe's fate until now. Reuters. SummaryA comet-chasing spacecraft has sent its first signal back to Earth. Hello World - 'hibernating' comet-chaser back in action Comet probe wakes up to resume mission Comet-chasing probe Rosetta operational after 31-month hibernation |

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