Aldrin, a fighter pilot and MIT-trained astronautics doctor, joined NASA's astronaut corps in 1963 and pioneered orbital rendezvous techniques used throughout the Gemini and Apollo programs. On July 20, 1969, he followed Neil Armstrong onto the lunar surface, becoming the second man to walk on the Moon.
Buzz Aldrin's path to the Moon ran through combat cockpits and doctoral seminars. He flew 66 combat missions as an Air Force fighter pilot during the Korean War, then earned a doctorate in astronautics from MIT, writing his thesis on orbital rendezvous techniques—the very problem NASA needed solved to make a Moon landing possible.
His technical rigor earned him the nickname 'Dr. Rendezvous' among fellow astronauts. During the Gemini 12 mission in 1966, he performed a spacewalk that proved astronauts could work effectively outside a spacecraft, a skill essential for lunar operations.
On Apollo 11, Aldrin's meticulous checklist discipline helped guide the Eagle lunar module to a safe touchdown after its computer nearly overloaded during descent. Stepping onto the Sea of Tranquility minutes after Armstrong, he offered his own memorable description of the lunar landscape: 'magnificent desolation.' Aldrin later became an outspoken advocate for Mars exploration, arguing that humanity's next giant leap should aim at the red planet.