Video: Change of command aboard International Space Station

Watch a 4K video replay of the launch of a SpaceX Falcon 9 rocket and Cargo Dragon spacecraft Dec. 6 on a resupply mission to the International Space Station.

A Northrop Grumman Cygnus cargo freighter departed the International Space Station Wednesday after delivering more than 7,800 pounds of equipment and experiments, heading for an extended mission with payloads to study fire behavior in microgravity and test a next-generation radio system.

A SpaceX Dragon cargo freighter departed the International Space Station Tuesday for return to Earth, wrapping up the 20th and final visit to the orbiting research complex for the current version of SpaceX’s supply ship before an upgraded Dragon starts launching later this year. Release from the space station’s robotic arm occurred at 9:06 a.m. EDT (1306 GMT), followed by splashdown in the Pacific Ocean at 2:50 p.m. EDT (1850 GMT).