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Galactic Cosmic Rays Shielding

Shielding strategies against galactic cosmic rays for space habitats, including the use of hydrogen-rich materials and magnetic shielding.

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Jan 18, 2026
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What shielding materials and habitat designs best reduce galactic cosmic ray dose for multi-month Mars missions?

Hydrogen‑rich, low‑Z (low atomic number) materials — notably polyethylene, water/ice, and hydrogenated composites — are the most effective passive shields against galactic cosmic rays (GCRs) because t...