When an astronaut is behind his Gemini capsule he cannot simply increase his speed to catch up with it. Increased speed will put him into a higher orbit, which will make him fall farther behind.

The astronaut ... to miss them,” he said of training efforts scheduled that week. “They're just too important.” The Purdue University graduate said the Gemini 8 malfunction didn't ...

Aldrin pioneered training techniques underwater to prepare for the for the Gemini missions, which preceded the Apollo missions. "I became the first astronaut to train underwater in neutral ...