What radiation types threaten Artemis II astronauts?

Van Allen belts (quick zap), solar particles (sudden spikes), galactic cosmic rays (endless heavy hitters).

How does Orion shield against space radiation ?

Composites block some protons, but GCRs fragment into trickier secondaries; orientation and ops fill gaps.

April 1, 2026. Crewed Orion/SLS lunar flyby, mapping radiation fields with humans aboard for Mars prep.

Astronauts strap in for Artemis II's lunar flyby. Glamour shot? Nah. The brutal truth: radiation that's frying cells in real time.

theAIcatchup Apr 10, 2026 3 min read

Radiation in deep space is a multi-threat beast: belts, solar flares, cosmic rays—no single fix. 𝕏
Artemis II prioritizes crew dosimetry over selfies, mapping Orion's protection in real human scenarios. 𝕏
Shielding paradoxes mean more isn't always better; operations like reorientation could halve doses. 𝕏

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Originally reported by Hacker News