Video: Change of command aboard International Space Station

One week after two cosmonauts and a NASA astronaut arrived at the International Space Station, the three crew members they’re replacing strapped into their own Soyuz spacecraft, undocked and returned to Earth Wednesday with a landing on the steppe of Kazakhstan to close out a 196-day mission.

NASA announced Monday that the launch of the first operational crew rotation mission to the International Space Station on SpaceX’s Crew Dragon spacecraft is set for the predawn hours of Halloween, eight days later than previously planned.

NASA has a builder to construct a five-ton spacecraft to catch up with the aging Landsat 7 Earth observation satellite and refuel it in 2020, employing robotic tools mastered in years of rehearsals on the International Space Station.