In March 2026, NASA astronauts are scheduled to conduct spacewalks to prepare the International Space Station for the installation of what?

In March 2026, NASA astronauts are scheduled to conduct spacewalks to prepare the International Space Station for the installation of new solar arrays. These crucial extravehicular activities, specifically U.S. spacewalks 94 and 95, are being undertaken by NASA astronauts Jessica Meir and Chris Williams, among others. Their mission involves installing modification kits and routing essential cables to ready the 2A and 3B power channels for the future attachment of International Space Station Roll-Out Solar Arrays, or iROSAs.

The addition of these advanced solar arrays is vital for the continued operation and enhanced capabilities of the orbiting laboratory. The original solar arrays, designed for a 15-year service life, have been functioning for many years and are showing expected signs of degradation. The new iROSAs are designed to augment the station's power supply, providing a significant 20% to 30% increase in electricity for ongoing research and operations. This power boost is critical for supporting both current scientific investigations and future technological demonstrations, including those related to NASA's Artemis missions.

These iROSAs represent a significant technological advancement in space power systems. Unlike the older, rigid solar panels, the iROSAs are a lightweight, flexible, and compact design that roll out like a measuring tape. This innovative design allows for easier launch and deployment. Once installed, these new arrays will be positioned in front of six of the existing arrays, leveraging the station's current sun-tracking and power distribution systems. The long-term goal of this upgrade (Review) is to effectively "reset the clock" on the station's power generation capabilities, ensuring a robust and sufficient power supply for at least another two decades, supporting the ISS through its planned lifespan.