Q&A with Elon Musk, SpaceX’s founder and CEO

NASA’s top human spaceflight official says the maiden flight of the Space Launch System, a behemoth booster designed to loft astronauts on expeditions into deep space, will be delayed from November 2018 until some time in 2019, according to a report published by a U.S. government watchdog Thursday.

The mission, dubbed NG-21, was the second out of three planned launches of a Cygnus spacecraft onboard a Falcon 9 rocket. Liftoff happened on Sunday, Aug. 4, at 11:02 a.m. EDT (1502 UTC).

SpaceX achieved a double success Friday with the launch of a Japanese communications satellite from Cape Canaveral, followed minutes later by the touchdown of the Falcon 9 rocket’s 15-story first stage booster on a ship in the Atlantic Ocean.