NASA Astronauts Complete 7-Hour Spacewalk to Prepare ISS Power System Upgrade https://ift.tt/Ms7XnB0 NASA Astronauts Complete 7-Hour Spacewalk to Prepare ISS Power System Upgrade NASA astronauts completed a 7-hour spacewalk to prepare the ISS for new roll-out solar arrays. The upgrades aim to boost power capacity, counter ageing systems, and support the station’s operations as it approaches its eventual retirement.