Artemis 2 astronauts will be studied for how sleep, stress and radiation shape human health in deep space during their moon mission next year.

The second installment of NASA's Artemis program to return to the moon and establish a sustained human presence in deep space is set to be the first crewed flight test of its Orion spacecraft and Space Launch System (SLS) rocket. The four-person crew is tasked with putting the vessel through its paces in the cislunar environment, and performing several science experiments during their mission.

Some of that research involves the astronauts themselves, who will turn into a quartet of biomedical subjects to help NASA gather in-flight data on the human body beyond low Earth orbit for the first time in more than 50 years. As they have with hundreds of

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