NASA astronauts Jessica Meir and Anil Menon closed a six-hour spacewalk after modifying one station power channel

Jessica Meir and Anil Menon stepped outside the International Space Station on Aug. 6 to prepare one of its power channels for another set of roll-out solar arrays. The operation lasted about six and a half hours and ended with the modification hardware in place. It was Meir’s sixth spacewalk and Menon’s first.

The work did not replace the station’s entire electrical system. It installed brackets and related equipment on power channel 3B so a future solar array can be mounted, connected and folded into the orbiting laboratory’s aging power network.

The astronauts built a mounting structure in orbit

The station’s original solar-array wings supply electricity to separate power channels distributed along its truss. New International Space Station Roll-Out Solar Arrays, known as iROSAs, sit in front of portions of the older wings and add generating capacity while using existing infrastructure.

NASA’s mission advisory for the August spacewalks assigned Meir and Menon to modify channel 3B. Outside the station, they assembled and secured triangular support hardware that will hold a new array scheduled for delivery later in 2026.

Every bolt requires a plan for weightlessness

Objects in orbit are weightless but still have mass. A tool or bracket can drift away, resist a change in motion or strike equipment if it is not restrained. Spacewalkers use tethers, body restraints and carefully choreographed handoffs to manage that risk.

Menon worked from an articulating foot restraint, giving him a stable position while handling structural pieces. Meir brought extensive extravehicular experience, including earlier station maintenance. Ground controllers tracked suit consumables, task timing and the electrical configuration throughout the operation.

Roll-out arrays compensate for decades of degradation

The station’s original photovoltaic wings were designed with limited lifetimes. Radiation, temperature cycling and small impacts gradually reduce output. The arrays remain useful, but their peak generating ability declines after years in orbit.

Roll-out arrays use flexible photovoltaic blankets stored around a central spool. Once released, stored structural energy helps unroll the blanket, reducing the need for a heavy deployment motor. Six iROSAs were already operating before the latest preparation, and the planned seventh will add power for research, life support and station systems.

The upgrade also supports the station’s final years

More electrical margin is valuable even as NASA plans the station’s eventual retirement. Aging hardware requires maintenance, and scientific payloads compete with pumps, computers, communications and environmental controls for electricity.

NASA has also said the additional array will support operations associated with a safe, controlled deorbit. That end-of-life plan requires reliable command, navigation and power systems. Upgrading a channel now therefore serves both productive research and the infrastructure needed to manage the station responsibly later.

A completed spacewalk closes only one stage

Post-event coverage from Space.com reported that the crew installed the seventh and final planned modification kit. The solar array itself must still launch, arrive in cargo and be installed during a later operation.

Engineers will review imagery, telemetry and astronaut observations for any issue that needs follow-up. A bracket can look complete on live video while torque records, cable routing or clearance measurements still require confirmation.

The mission illustrates how orbital construction differs from a single launch. The station has evolved through hundreds of spacewalks and robotic operations, with new equipment attached to hardware designed decades earlier. Each addition must fit mechanical, electrical and thermal constraints that cannot be solved by replacing the building around it.

Meir and Menon’s six-hour shift moved one power channel closer to its next upgrade. The visible result is a frame waiting in space; the practical result is future electrical capacity for a laboratory nearing three decades of continuous assembly and use.

Electrical work outside the station requires isolation

Solar arrays remain exposed to sunlight during much of an orbit, and the station’s power system operates at voltages that demand strict control. Engineers configure channels before a spacewalk, identify keep-out zones and schedule steps around periods of orbital daylight and darkness. Procedures are written so the crew does not improvise around an energized connector.

The station passes from daylight into night roughly every 45 minutes. Temperatures can swing sharply across that boundary, changing how metal, cables and spacesuit components behave. Mission control can pause a task if lighting, communications or suit telemetry moves outside the planned margin.

Spacesuits function as personal spacecraft

Each astronaut depends on the suit for oxygen, cooling, carbon-dioxide removal, pressure and radio contact. Gloves must preserve pressure while allowing enough movement to turn tools and handle small restraints. That combination makes routine mechanical work slower and more tiring than the same job on Earth.

Meir wore the suit marked with red stripes as the lead spacewalker, while Menon used the unmarked suit. Their roles were assigned before the operation, but both trained to respond to a tool problem, suit alarm or partner emergency. The Quest airlock team inside the station supported suit preparation before and after the excursion.

Spacewalk duration includes more than the minutes spent tightening hardware. Translation along handrails, inspection, cleanup and returning to the airlock all consume oxygen and cooling water. Completing the objectives within roughly six and a half hours therefore reflected both construction progress and disciplined resource management.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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