For 10 years, European Space Agency spacecraft Rosetta has been making wide arcs through the solar system as it uses planets’ gravity to slingshot itself toward its destination. It spent the last three years in hibernation to preserve energy as it traveled too far from the sun to fully power itself on solar energy.
Today, the Rosetta will wake up. It’s now close enough to its final destination, the 67P/Churyumov-Gerasimenko comet, that it is time to begin preparing for its main mission: collect data and deliver the Philae lander to the comet’s surface. It will be the first spacecraft to orbit a comet and first lander to set down on a comet.
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