Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

SpaceX’s first Crew Dragon spacecraft wrapped up its five-day stay at the International Space Station at 2:31 a.m. EST (0731 GMT) Friday with a smooth undocking, then nailed an on-target splashdown in the Atlantic Ocean east of Florida at 8:45 a.m. EST (1345 GMT).

A SpaceX Falcon 9 rocket launched Feb. 22 from Vandenberg Air Force Base in California with the Spanish Paz radar observation satellite and two prototypes for a planned broadband Internet network.

A United Launch Alliance Delta 4 rocket will deliver the U.S. Air Force’s second GPS 3-series navigation satellite into an elliptical transfer orbit nearly two hours after liftoff from Cape Canaveral.