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Loading contentBuilding shelter on another world rather than carrying it there. Concepts range from covering habitats with bagged regolith for radiation shielding to three-dimensional printing of structures from local soil, so that the mass launched from Earth shrinks and the base can grow using what is already on the ground.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.