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By the SpaceNexus Desk
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On October 29, 2026, NASA astronaut Anil Menon and Canadian Space Agency astronaut Joshua Kutryk conducted a spacewalk outside the International Space Station to install the seventh of eight ISS Roll-Out Solar Arrays (iROSA). NASA's update confirmed the start of the excursion at 8:02 a.m. EDT, with the astronauts beginning the spacewalk at 7:57 a.m. EDT. NASA's station blog reported that the pair concluded the spacewalk at 3:08 p.m. EDT, and Space.com described it as a roughly seven-hour excursion.
Spaceflight Now reported that the astronauts successfully installed and unfurled the new panel, which is designed to power the outpost through its retirement in 2030. Space.com noted that the outing was the 100th U.S. spacewalk conducted by ISS crew members, a milestone in the program's long history of on-orbit assembly and maintenance. Menon and Kutryk are Expedition 75 crewmates.
We previously covered the arrival of the last two arrays aboard a Dragon cargo mission and the plan for Kutryk to take part in two spacewalks to install them. This piece leads with the new development: the first of those two installations is now complete, leaving one array to go.
The roll-out arrays are supplemental solar wings mounted over portions of the station's original arrays, which have degraded over decades of operation. Each unit is compact at launch and unfurls once in place. The upgrade program was conceived to restore and increase available power as the original arrays lose efficiency and as demand from research payloads, commercial activities and life support systems remains high.
With seven of eight installed, most of the planned power gain is now in place. The remaining array will complete the program's design configuration.
Power is a foundational resource on a space station. It determines how many experiments can run simultaneously, how much capacity is available for commercial users, and how much margin the station has when components fail or when visiting vehicles draw load. The iROSA program is one of the least visible but most consequential sustainment efforts on the ISS.
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The timing carries strategic weight. NASA is committed to operating the ISS through 2030 and then transitioning to commercial low Earth orbit destinations. A reliable power system through that window supports both science output and the credibility of the transition plan. If the station were power-constrained in its final years, the pressure to prioritize operations would fall on research and commercial payloads, which are exactly the activities that commercial station developers will cite as demand evidence.
The 100th U.S. spacewalk is also symbolic. It reflects the accumulated operational knowledge of EVA planning, suit maintenance, tool development and crew training that NASA and its partners have built over 25 years of continuous human presence. That institutional capability is among the assets that commercial station operators will need to replicate or purchase as services.
The participation of a Canadian astronaut in a landmark U.S. spacewalk illustrates the partnership structure of the ISS. Kutryk's role in installing a critical power upgrade shows how deeply partner astronauts are integrated into the station's maintenance, a reminder that the station's end of life affects Canada, Europe, Japan and others as well as the United States. Canada's current policy discussions on sovereignty and domestic capability make the visibility of this contribution notable.
Commercial station developers are watching ISS sustainment carefully. A well-powered station through 2030 means NASA's research and technology demand continues to flow to the existing platform, and it narrows the window in which commercial destinations must be operational to avoid a gap. The power upgrade reduces the risk of an unplanned capability reduction, but it also reinforces the argument that the ISS will remain the primary platform until its scheduled retirement.
For commercial customers, including pharmaceutical, materials and in-space manufacturing companies, higher power margins on the ISS mean more flexible hosting arrangements in the near term. They also provide benchmarks for what future stations must offer: power per payload, thermal rejection capacity and stable operations.
The iROSA program is a lesson in extending the life of existing infrastructure through modular upgrades. Suppliers of deployable structures, flexible solar cells and robotic and EVA tools have a reference case. As more operators consider in-orbit servicing, hardware designed for installation by astronauts or robots, and for retrofit onto legacy structures, becomes a design requirement rather than an exception. This links to the broader debate about servicing and rescue of orbital assets, where the industry has recently seen the unsuccessful attempt to boost a NASA science satellite.
For NASA, completing the upgrade is part of demonstrating responsible stewardship through the program's final years. The agency faces budget scrutiny, and the Aerospace Corporation's 2026-2027 federal civil space budget guide shows how widely space activity is distributed across federal line items. Visible, on-schedule sustainment milestones help justify continued funding for operations while attention shifts toward Artemis and commercial destinations.
International partners will use the milestone to affirm that the station remains a stable platform for their own research programs through 2030. Their planning for post-ISS activity, whether on commercial stations or national modules, depends on knowing that the current platform will not degrade abruptly.
The 100th spacewalk is a reminder that EVA operations remain labor and training intensive. Each excursion requires months of preparation, suit readiness, and ground support. As the number of remaining ISS spacewalks falls, the industry must consider how EVA expertise transfers to commercial stations and lunar surface operations. NASA's preparation for the next moonwalk simulations, including underwater testing, shows that EVA skills are central to Artemis as well.
The immediate next step is the installation of the eighth and final iROSA. Based on our earlier coverage of the plan for two spacewalks to install the last two arrays, the final installation is expected to follow in a subsequent EVA. We have not seen a confirmed date in the sources for this analysis, so readers should watch NASA's station blog for scheduling updates.
Once the final array is installed, attention will turn to several downstream questions:
The key risk is operational: spacewalks carry inherent hazards and can be delayed by suit issues, crew health or station anomalies. A slip in the final installation would not by itself compromise station safety, since the arrays are augmentations, but it would delay the full realization of the upgrade.
Overall, the seventh array is a quiet but meaningful indicator that the ISS is being kept in good working order for its final phase. For an industry preparing to replace it, that continuity is both a comfort and a deadline.
Because this analysis is about crewed spaceflight.
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