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Robotics technologist Brendan Chamberlain-Simon, left, of NASA's Jet Propulsion Laboratory and spacesuit engineer Zach Fester of the agency's Johnson Space Center adjust a thermal vacuum chamber called CITADEL at JPL on Nov. 12, 2024, before testing an astronaut boot inside the chamber. Built to prepare potential robotic explorers for the frosty, low-pressure conditions on ocean worlds like Jupiter's frozen moon Europa, CITADEL (Cryogenic Ice Testing, Acquisition Development, and Excavation Laboratory) has also proven key to evaluating how astronaut gloves and boots hold up in extra…
