Buzz Aldrin shot down two MiG-15 aircraft. After earning a Sc.D. degree in astronautics from the Massachusetts Institute of Technology, Aldrin was selected as a member of NASA's Astronaut Group 3, making him the first astronaut with a doctoral degree. His doctoral thesis was "Line-of-Sight Guidance Techniques for Manned Orbital Rendezvous", earning him the nickname "Dr. Rendezvous" from fellow astronauts. His first space flight was Gemini 12 during which he spent over five hours on extravehicular activity (EVA) outside the spacecraft. Aldrin set foot on the Moon at 03:15:16 on July 21, 1969 (UTC), nine minutes after Armstrong first touched the surface,
Apollo 11 in popular culture that was away, they concluded that it was most likely one of four panels that had linked the spacecraft and the upper stage. Later popular accounts often described this as a "UFO sighting" or claimed the widely reported incident had been "covered up." At age 76, astronaut Buzz Aldrin said in a television documentary, "There was something out there, close enough to be observed, and what could it be?... Now, obviously the three of us weren't going to blurt out, 'Hey, Houston, we've got something moving alongside of us and we don't know what it is', you know?... We knew