Videos: Replays from successful Atlas 5 launch of TDRS-M

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.

More than three years after its launch was delayed by a corporate merger, a commercial Earth-imaging satellite has finally shipped to its California rocket base for liftoff aboard an Atlas 5 in September.

A Soyuz rocket with a three-person crew heading for the International Space Station lifted off at 1357 GMT (9:57 a.m. EDT) Wednesday in the final launch currently scheduled from Gagarin’s Start, a historic site at the Baikonur Cosmodrome in Kazakhstan from where Yuri Gagarin departed on the first human spaceflight in 1961. Beginning next year, Soyuz crews will blast off from a different pad at Baikonur.