Video: Falcon launch replays

Ten days after the last liftoff from historic launch pad 39A in Florida, another SpaceX Falcon 9 rocket ignited its Merlin main engines for several seconds in a hold-down firing Thursday ahead of a planned expendable flight next week with an Inmarsat communications satellite.

SpaceX launched a Falcon 9 rocket at 7:29 a.m. PDT (10:29 a.m. EDT; 1429 UTC) Sunday from Vandenberg Space Force Base, California with 10 missile tracking and data relay satellites for the U.S. military’s Space Development Agency. The launch occurred three days after SpaceX aborted the first launch attempt at T-minus 3 seconds to examine data from one of the Falcon 9’s main engines.

SpaceX test-fired nine Merlin engines Saturday before the company’s next launch from Cape Canaveral, clearing a key readiness test before liftoff as soon as Sunday night with 60 more Starlink internet satellites.