After 4 Billion Mile Trip, Just a Half Marathon to go for Philae as it Tries to Make First Ever Soft Landing on a Comet

At 9:03 GMT tomorrow, or 4:03 a.m. Eastern time in the United States, the final stage in an historic 10-year adventure is set to begin: The Rosetta spacecraft will attempt to drop a refrigerator-sized lander onto the rough and rocky surface of a comet.

For the Philae lander, which has been safely secured to Rosetta during the long trip to Comet 67P/Churyumov–Gerasimenko, that last leg of the journey will be only 13.67 miles. That’s a little more than a half marathon — after a 4 billion mi

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