Artemis 2 astronaut Christina Koch of NASA looks at Earth as her Orion spacecraft heads toward the moon in April 2026. (Image credit: NASA)

A week after her historic moon mission ended, NASA astronaut Christina Koch struggled to walk in a straight line during a blindfold test.

After posting a video showing her wobbling and nearly tipping over — nearly enough, in fact, that attendants jumped in ready to help — Artemis 2 's Koch joked about her recovery on Instagram : "Guess I'll be waiting a minute to surf again."

In microgravity , she added, the brain learns how to ignore signals our body automatically generates when moving around.…