Only one dummy will get a prototype radiation shield.

Space Canary

NASA plans to test a new cosmic radiation-blocking vest next year by sending a pair of dummies on a trip around the Moon.

One of the main obstacles for long-term space travel is the dangerous levels of radiation from the Sun and deep space that would constantly blast astronauts. By measuring how well its new vest, StemRad, protects one of the two dummies, reports that NASA will be better prepared to once more send humans to the surface of the Moon.

Artemis Prep

The StemRad vest looks vaguely like what a dentist drapes over a patient before x-raying their mouth. It's specifically designed to shield a woman's torso and block particularly-sensitive body parts like the stomach, lunges, and bone marrow, according to, but it can be adjusted to fit a man's body as well.

By strapping it onto a dummy and launching it into space, NASA will get a better idea of how to protect the woman astronauts it sends to the Moon on its planned 2024 mission, reports. While the unfortunate, unprotected dummy bears the full brunt of the cosmic rays, the other will — hopefully — enjoy a smooth journey thanks to its new 57-pound vest.

READ MORE: 'Phantom' Vest-Wearing Dummies to Fly Around the Moon []

More on cosmic radiation: European Space Agency: Radiation Will Make Mars Mission Deadly

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