On October 29, 2026, two astronauts completed the 100th U.S. spacewalk from the International Space Station. NASA’s Anil Menon and CSA’s Joshua Kutryk installed a new solar array during their 7-hour mission. "This is USOS EVA 100, which is an incredible milestone," said Menon. This upgrade helps power the station.

October 29, 2026

— Two astronauts completed the 100th U.S. spacewalk from the International Space Station on Thursday (Oct. 29), as counted when a space shuttle was not docked at the orbiting outpost.

Anil Menon of NASA and Joshua Kutryk of the Canadian Space Agency (CSA), both Expedition 75 flight engineers, successfully installed a new solar array to extend the space station's electricity supply during the 7-hour and 11-minute extravehicular activity (EVA). The outing began at 7:57 a.m. and ended at 3:08 p.m. EDT (1157 to 1908 GMT).

"This is USOS [U.S. Operating Segment] EVA 100, which is an incredible milestone. I think it really signifies how much we have done," said Menon at the conclusion of Thursday's spacewalk.

The seventh and penultimate ISS roll-out solar array (IROSA) installation since 2021 provides the station with the added power it needs to operate through to its retirement, deorbit and reentry planned for 2030. The final IROSA is scheduled to be unfurled during a Nov. 5 EVA to be conducted by Menon and Kutryk.

The milestone spacewalk is out of the 285 total spacewalks that have supported the International Space Station's assembly, maintenance and upgrades — including 66 spacewalks from the Russian segment and 119 conducted while space shuttle crews were visiting.

The first U.S. spacewalk conducted from the Quest airlock without a shuttle present at the station was made by Expedition 4 crewmates Carl Walz and Dan Bursch, both with NASA, on Feb. 20, 2002. The five-hour and 47-minute EVA tested the airlock's systems and tackled "housekeeping chores."

Since then, 51 astronauts from NASA, seven from the European Space Agency (ESA), four with the Japan Aerospace Exploration Agency (JAXA), three Roscosmos cosmonauts, one CSA astronaut and one crew member from the United Arab Emirates (UAE) have been part of the first 100 U.S. spacewalks as marked on Thursday. All wore extravehicular mobility unit (EMU) suits during the time they worked in the vacuum of space.

The 100th space station EVA including Russian outings but excluding shuttle spacewalks was completed in 2018, when the count was divided between 48 U.S. and 51 Russian. The overall 100th ISS spacewalk (including shuttle EVAs) was made in 2007; the 200th followed ten years later.

Widening the count to include other spacecraft and orbital platforms, the total number of EVAs reached 500 with a spacewalk from China's Tiangong space station on Aug. 28, 2026, conducted by Zhu Yangzhu and Zhang Zhiyuan. (The total number of EVAs can differ, though, depending on how you count them.)