Video: Russian cargo ship spinning

Astronauts Shane Kimbrough and Thomas Pesquet put on their self-contained spacesuits and headed outside the International Space Station on Friday for a six-and-a-half hour excursion to prepare for the relocation of a docking adapter, service the lab’s Dextre robot, and install a new computer relay box.

Pettit will fly to the orbiting outpost alongside Russian cosmonauts Alexey Ovchinin and Ivan Vagner on the Soyuz MS-26 mission. Liftoff from the Baikonur Cosmodrome is set for 12:23 p.m. EDT (1623 UTC).

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.