This is a 1970s retro "future" space station idea by NASA (thus safely public domain). It's a rather odd idea, but I guess the ring is suppose to rotate around the shaft to create gravity. <br/>未來空間站<br/>construction、future、NASA、planet、platform、retro、scifi、shuttle、space、space station<br/>施工、未來、NASA、行星、平台、復古、科幻、穿梭、空間、空間站<br/>資料來源:openclipart ( https://openclipart.org/ )
修改日期:2026-05-29