Falcon 9 launches TESS as seen from KSC Press Site (members only)

SpaceX’s launch team fueled up a Falcon 9 rocket on a California launch pad Thursday, fired the booster’s nine Merlin engines, and passed a key preflight test for the first time since a Falcon 9 exploded during a similar practice countdown in September.

The mission marked the first time that an American-made rocket launched Europe’s answer to the GPS satellite constellation. Liftoff from Launch Complex 39A happened at 8:34 p.m. EDT (0034 UTC) on Saturday, April 27.

SpaceX started the week with the launch of a Falcon 9 rocket from NASA’s Kennedy Space Center in Florida just after sunrise Monday, delivering a classified U.S. government spy satellite to orbit as the booster’s first stage returned to Cape Canaveral for a vertical landing.