Europe's comet-chasing space probe Rosetta dipped out of orbit Friday with a slow-motion crash onto the icy surface of the alien world it's been following for more than a decade. Its final radio ...
The European probe Rosetta has been chasing comet 67P/Churyumov-Gerasimenko for more than 10 years. This spring it's finally catching up. But not so fast. To reach its target, the spacecraft must now ...
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