NASA astronaut Jessica Meir and European Space Agency (ESA) astronaut Sophie Adenot concluded a spacewalk outside the International Space Station (ISS) on Tuesday for spacecraft navigation, scientific research, and station maintenance. The duo began the spacewalk at 8:40 a.m. Eastern Time (1240 GMT).

During the 6-hour, 49-minute spacewalk, Meir and Adenot installed a new retroflector on the space station’s Harmony module to support spacecraft navigation during rendezvous and docking operations. They also replaced a high-definition camera on the station’s truss and collected a swab of the space station’s exterior for microorganisms. Work was also partially completed to install jumper cables for electrical systems, and preparations began for the replacement of the Alpha Magnetic Spectrometer’s heat-rejecting radiator on a future spacewalk.

Adenot experienced some mobility issues with her left arm during the spacewalk, which Meir inspected. The issue was likely caused by the glove heater harness getting caught, restricting movement in the left shoulder joint. Unzipping the joint appeared to resolve the issue before the crew entered the airlock.

This was Meir’s seventh and Adenot’s third spacewalk, and the 284th spacewalk in support of ISS assembly, maintenance, and upgrades.