What is the approximate shielding thickness required on the lunar surface to manage baseline radiation levels?

Answer

Approximately 5 meters of loose soil or equivalent water-rich material.

To manage the radiation hazard, especially Galactic Cosmic Rays, protective habitats need to be built underground or covered with a significant mass, estimated at about five meters of lunar soil.

What is the approximate shielding thickness required on the lunar surface to manage baseline radiation levels?

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