Regolith

Regolith is the layer of rocky or icy debris, sand, and dust made by meteoritic impact that forms the uppermost surface of planets, satellites and asteroids. It is a possible construction material in the form of sintered regolith bricks. Loose regolith may also be used as a radiation shield.

Open Issues

• How radioactive is regolith?
• What are the compositions of the regolith near possible settlement sites?