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An important reason for this view is radiation. The earth has a magnetic field that keeps harmful radiation at bay, but astronauts who fly beyond this field are at risk of developing cancer and other serious health problems. They wore it as they performed ordinary activities and gave feedback on its comfort and functionalities, allowing engineers on the ground to make improvements.
In 2019 and 2020, NASA arranged for astronauts to test AstroRad onboard the International Space Station.
Despite their best efforts to settle the moon and later Mars, humans may never become a spacefaring species, more than a few experts have said over the years.
In this mission, the crew capsule carried two human-shaped dummies named Helga and Zohar as it travelled around the moon before returning to the earth. Both Helga and Zohar were fit with materials designed to mimic human tissue as well as radiation sensors. Zohar wrote AstroRad while Helga did not. Per the team, for astronauts heading back to the moon and eventually to Mars, AstroRad could allow astronauts to partially work through a solar storm instead of having to shelter themselves for the duration — a small but important step towards making interplanetary human spaceflight a safe reality.
NASA tested the improved version onboard its Artemis I mission in 2022. The results of analysing the data retrieved from the dummies were published in Science Advances on August 12. Using data collected during Artemis I to inform models of historical solar radiation events, researchers — from StemRad, Lockheed, the German, Israeli, and U.S. space agencies, and institutions in the U.S. — found AstroRad could reduce the effective radiation dose an astronaut would have received during the August 1972 solar storm by 60% and during the October 1989 solar storm by 40%. These amount to 193 and 131 fewer days, respectively of exposure to deep-space radiation.
