Live coverage: Vega rocket deploys second Sentinel satellite

An Ariane 5 rocket has blasted off from a tropical launch pad in French Guiana on nearly 3 million pounds of thrust, hoisting two U.S.-built communications satellites to orbit for commercial owners in Brazil and Japan.

Watch a time lapse video chronicling several days of activity to ready the European Space Agency’s sleek IXV re-entry demonstrator for flight.

With the flagship-class ExoMars program nearing the finish line after a decade in development, European Space Agency officials want to complete negotiations with the mission’s industrial teams before committing to a 2018 launch date for a European-built Mars rover.