Summary

Completing a complex upgrade five years in the making, two spacewalking astronauts on Thursday mounted an eighth and final roll-out solar wing on the International Space Station , boosting the lab's power output to compensate for the age-related degradation of its original arrays. NASA began the power-system upgrade in 2021 when two spacewalkers installed the first ISS roll-out solar array, or IROSA, at the base of one of the original eight wings.

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