Europe’s Rosetta comet chaser was due to swing by Earth for the last time late last week before heading out on the final leg of its 10-year journey to the comet 67P/Churyumov-Gerasimenko. The swingby, set for Nov. 13, is the last of four planetary assists (including three around Earth) intended to provide the gravity-slingshot boost needed to continue into the outer Solar System, where the rendezvous will take place. After a close encounter with the asteroid 21 Lutetia in July 2010, Rosetta ...
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