Live coverage: Cygnus supply ship arrives at space station

Astronauts Christina Koch and Andrew Morgan floated outside the International Space Station Sunday and completed a 7-hour, 1-minute spacewalk to begin replacing batteries on the far left side of the research outpost’s solar array truss, the first of up to six excursions scheduled before the end of October.

United Launch Alliance has packed two days of rollout, countdown and launch activities into a two-minute video highlighting Friday night’s blastoff of an Atlas 5 rocket from Cape Canaveral with the U.S. Air Force’s SBIRS GEO Flight 4 missile-warning satellite.

A Russian Soyuz spacecraft featuring a variety of avionics upgrades and other changes to improve reliability and performance docked with the International Space Station early Saturday after a two-day orbital chase, bringing three fresh crew members to the lab complex.