After 10 Years in Space, This Probe Is About to Catch a Comet

After a 4.3 billion-mile nonstop flight, Rosetta is about to reach its destination. The European Space Agency vehicle has spent a decade circling our solar system in pursuit of comet 67P/Churyumov-Gerasimenko. And to prepare for the trip, ESA tested and equipped the vessel for any cosmic curveballs it might encounter on the way.