Phantom Twins: Helga and Zohar will experience deep Space radiation inside Orion.

They are made of materials that mimic the soft tissue, organs, and bones of a woman to test how radiation passes through the human body.

Zohar will wear AstroRad, a radiation protection vest, to test how effective it could be if future crews encounter a solar storm, while Helga will be unprotected. The AstroRad vest was recently tested on the International Space Station.

See also dictionary entries on Helga & Zohar, Mannequins, and the MARE programme.

Watch this video for more information: NASA’s Artemis I ‘Passengers’