European spacecraft begins descending to comet 67P
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The European Space Agency says its unmanned Rosetta probe has successfully released a lander toward the surface of comet 67P/Churyumov-Gerasimenko.
The 100-kilogram (220-pound) lander will take seven hours to reach the comet's icy surface.
If successful, it will be the first time that a spacecraft has landed on a comet.
