70sscifiart:1970s NASA concept art by Don Davis, depicting giant orbiting spaceship outposts big eno
70sscifiart:1970s NASA concept art by Don Davis, depicting giant orbiting spaceship outposts big enough to house 10,000 people.via -- source link
70sscifiart:1970s NASA concept art by Don Davis, depicting giant orbiting spaceship outposts big enough to house 10,000 people.via -- source link