Live coverage: Space station crew investigating slow pressure leak

Astronaut Christina Koch, launched to the International Space Station in March, marks her 289th day in space Saturday, breaking retired astronaut Peggy Whitson’s world record for the longest single spaceflight by a female.

Bidding their crewmates farewell, a Russian cosmonaut and two NASA astronauts boarded their Soyuz ferry craft, undocked from the International Space Station and fell back to Earth Tuesday, landing safely on the snowy steppe of Kazakhstan to close out a 168-day mission.

In this time-lapse video, the Falcon 9 rocket with the Crew Dragon atop rolls to launch pad 39A at the Kennedy Space Center for the first time on January 3. The rocket was then lifted vertical for a series of fit checks and tests.