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Nuclear warmed spacesuit could keep moon astronauts warm

·Sep 7, 2026
Source: The Weather Channel
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Photo credit : NASA spacesuit

A NASA crew member practices using lunar tools to collect geology samples at NASA’s Johnson Space Center during an elevated suit pressure test where teams evaluate how well crew perform tasks in different suit pressure levels while wearing the Artemis III lunar spacesuit developed by Axiom Space called the AxEMU (Axiom Extravehicular Mobility Unit).(NASA/Bill Stafford)Astronauts may utilize spacesuits with small nuclear heaters in future missions to the Moon and Mars to protect against extreme cold. NASA awarded a $175,000 nine-month grant through its Innovative Advanced Concepts program to Zeno Power Systems to investigate using small radioactive heaters to keep astronauts warm on the Moon. As part of Project EARENDIL (Extended Astronaut Radioisotope-EVA in Nighttime and Deep-space Icy Landscapes), the study will investigate whether compact americium-241 thermal heaters are feasible to use in spacesuits. Americium-241 is a common radioactive byproduct of nuclear reactors. Temperatures in areas of the moon that never receive direct sunlight, such as the base of craters, and in other areas during the two-week lunar night can plunge as low as -410 degrees.

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