Video: Change of command aboard International Space Station

The MS-25 mission was scrubbed on Thursday, but the root cause is still under investigation. The earliest that liftoff from the Baikonur Cosmodrome can now occur is Saturday, March 23, pending the outcome of the investigation.

In a mission marking the end of an era, NASA astronaut and former virus hunter Kate Rubins, using NASA’s last currently contracted seat on a Russian Soyuz spacecraft, blasts off Wednesday with two cosmonaut crewmates on a flight to the International Space Station.

A Russian cosmonaut and his NASA co-pilot, five months after riding out a dramatic launch abort last October, finally made it into orbit Thursday and, along with a NASA astronaut making her first flight, docked with the International Space Station six hours later to boost the lab’s crew back to six.