This was the most complex mission attempted to date. The primary mission objectives were to perform rendezvous and four docking tests with the Gemini Agena Target Vehicle (GATV) and to execute an ExtraVehicular Activity (EVA)…
On September 20th 1965, NASA named the crew for Gemini VIII. The command pilot selected was Neil Armstrong, a civilian test pilot with much experience in the X-15 rocket research aircraft program. David Scott was selected as pilot. Scott was the first of the Group 3 astronauts selected for a mission. The backup crew for Gemini VIII, was Navy Lieutenant Commanders Pete Conrad and Richard F. Gordon, Jr.
Many doubted that Agena could be ready in time to meet Gemini’s tight launch schedules. The end of 1965 saw Agena’s usefulness in manned space flight once again called into question, but this time time a substitute target had already been approved for development…
The Gemini Program was conceived after it became evident to NASA officials that an intermediate step was required between Project Mercury and the Apollo Program. The major objectives assigned to Gemini were:
1-To subject two men and supporting equipment to long duration flights — a requirement for projected later trips to the moon or deeper space.
2-To effect rendezvous and docking with other orbiting vehicles, and to maneuver the docked vehicles in space, using the propulsion system of the target vehicle for such maneuvers.
3-To perfect methods of reentry and landing the spacecraft at a pre-selected land-landing point.
4-To gain additional information concerning the effects of weightlessness on crew members and to record the physiological reactions of crew members during long duration flights.