Gemini 3 (Gemini’s first manned mission) was the first time a space capsule changed its orbit mid-flight. Gemini 4 featured the first space-walk. Gemini 5, the first use of oxygen-hydrogen fuel ...

To achieve this, Gemini needed something no other spacecraft before had been equipped with: a space radar. NASA had planned extensively for the Gemini rendezvous maneuvers, building a special ...