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A comet-chasing space probe that has been in hibernation for almost three years has woken up and sent its first signal back to Earth.
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The European Space Agency received the all-clear message “Hello World!” from its Rosetta spacecraft some 800 million kilometers (500 million miles) away shortly after 7 p.m. (1800 GMT; 1 p.m. EST).

Rosetta was put into hibernation in 2011 to conserve energy for its long journey to meet with comet 67P/Churyumov-Gerasimenko.

If all goes as planned the probe will rendezvous with the comet in the coming months and drop a lander onto its icy surface in November.

Rosetta is named after a block of stone that allowed archeologists to decipher ancient Egyptian hieroglyphs. Scientists hope the probe’s findings will help them understand the composition of comets and thereby discover more about the origins and evolution of our solar system.

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Click link below for article and 78 Mind-Blowing New Photos from Space:
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