Spaceflight, alternate 70s: a Big Gemini docked to the McDonnell Douglas Growth Space Station. The Big Gemini was a McDonnell Douglas proposal to take the original Gemini hardware and overhaul it for space station logistics operations by expanding the crew capsule and giving it a big service module with a docking apparatus. The Growth Space Station was the company's concept for a module space station that would be expanded over time, essentially a proto-ISS. Renders made with Blender.