Watch a replay of the Delta 4 NROL-47 launch

The center section of SpaceX’s first Falcon Heavy rocket has been test-fired at the launch company’s test facility in Central Texas, a sign of progress toward the behemoth booster’s long-delayed maiden mission scheduled some time in the final months of 2017.

Follow the key events of the Soyuz rocket’s ascent into orbit from the Guiana Space Center with the SES 15 communications satellite.

Follow the Delta 4 rocket’s ascent into orbit from Cape Canaveral’s Complex 37 launch pad with the U.S. Air Force’s WGS 7 communications satellite.