Video: Soyuz MS-01 leaves the space station for landing

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).

A Russian-built Soyuz booster lifted off Friday from the European-run spaceport in French Guiana, carrying four new broadband Internet satellites to orbit to join the O3b network owned by SES. Launch occurred at 1710:06 GMT (12:10:06 p.m. EST).

SpaceX tested astronaut slidewire escape baskets and fire suppression capabilities Friday at launch pad 39A in Florida, demonstrating systems that would be activated in the event of an emergency before liftoff of a crewed mission.