User:Haik.shoug/sandbox

At the completion of the previous Gemini flight, the program still had not demonstrated that an astronaut could work easily and efficiently outside the spacecraft. In preparation for Gemini XII new, improved restraints were added to the outside of the capsule, and a new technique—underwater training—was introduced, which would become a staple of future space-walk simulation. Aldrin's two-hour, 20-minute tethered space-walk, during which he photographed star fields, retrieved a micrometeorite collector and did other chores, at last demonstrated the feasibility of extravehicular activity. Two more stand-up EVAs also went smoothly, as did the by-now routine rendezvous and docking with an Agena which was done "manually" using the onboard computer and charts when a rendezvous radar failed. [copied from Gemini 12 Wikipedia article]

The purpose of the Gemini 12 mission was mainly to find and test new ways to work outside of a spacecraft safely and effectively. These are called EVAs (Extravehicular Activities) more commonly known as space walks. Prior to the Gemini 12 mission, other astronauts of the Gemini program had indeed attempted EVAs. However, they're successes were limited as concerns with mobility made it very difficult to work out of a space suit. Aldrin would conduct three EVAs throughout the mission. With new technologies and improved techniques, Aldrin was able to set the record for most successful EVAs at the time.

Two more stand-up EVAs also went smoothly, as did the by-now routine rendezvous and docking with an Agena which was done "manually" using the onboard computer and charts when a rendezvous radar failed. The climb to a higher orbit, however, was canceled because of a problem with the Agena booster. [Copied from Gemini 12 article]

During the ascent stage approximately 140 seconds after the rockets started firing, an anomaly occurred with the thrust chamber of the rocket. The problem that occurred was a 30 psi drop in pressure for about one second. After this brief moment, the pressure returned to normal for the rest of the ascent. No major issues occurred in the main part of the mission as a result of this pressure drop. However, the mission had planned for entry into higher orbit into higher at some point in Aldrin and Lowell's time in space. This pressure drop caused both the astronauts and ground crew to air on the side of caution and abandon the climb to higher orbit. The cancellation was also contributed to problems with the fuel cells on the Gemini capsule.