NASA on The Commons:
Space Colonization Concept Illustration
NASA on The Commons:
Space Colony Concept Eclipse
NASA on The Commons:
Cylinder Endcap
NASA on The Commons:
Cylinder Interior
NASA on The Commons:
Cylinder Space Colony Exterior
NASA on The Commons:
Bernal Sphere Concept Art
NASA on The Commons:
Bernal Construction
NASA on The Commons:
Space Colony Concept Agriculture
NASA on The Commons:
Bernal Sphere Space Colony Concept
NASA on The Commons:
Bernal Interior
NASA on The Commons:
Exterior View of the Bernal Sphere Space Colony Concept
NASA on The Commons:
Torus Model
NASA on The Commons:
Torus Construction
NASA on The Commons:
Space Colony Concept - Torus Interior
NASA on The Commons:
Toroidal Space Colony Concept
NASA on The Commons:
Exterior View of Toroidal Colony