In this image from video provided by NASA, Artemis II astronauts, from left, Reid Wiseman, Jeremy Hansen, Christina Koch and Victor Glover gather for an interview en route to the moon on Saturday, April 4, 2026. (NASA via AP)

By The Canadian Press

Artemis II mission highlights deep space effects on astronauts’ bodies

Apr 5, 2026 | 10:57 AM

MONTREAL — The Artemis II mission highlights how deep space poses new challenges for the human body, even on a short 10-day journey, with risks such as radiation and other effects that scientists are still studying.

Dr. Farhan Asrar, a space medicine expert, explains how deep space travel affects astronauts’ bodies and minds, from fluid shifts and muscle loss to radiation exposure and confined living conditions.

They must adapt to microgravity, maintain fitness with innovative exercise equipment, and manage limited resources and space.

The crew aboard the Artemis II mission is about four days into a 10-day journey, which includes a lunar flyby in a compact capsule the size of a campervan.

Upon returning to Earth, astronauts will undergo rehabilitation to regain muscle strength and acclimate to the effects of gravity.

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Asrar hopes the data gathered will prepare future missions to Mars and beyond.

This report by The Canadian Press was first published April 5, 2026.

The Canadian Press