Any of these organs can generate pain, and it is sometimes difficult to pinpoint the exact source of abdominal or pelvic pain. In girls and women, it can stem from the urinary, gastrointestinal or reproductive system.
The first human-made object to reach the surface of the Moon was the Soviet Union 's Luna 2 mission, on 13 September 1959. The United States' Apollo 11 was the first manned mission to land on the Moon, on 20 July 1969.
On July 20, 1969, Apollo 11 astronauts Armstrong and Aldrin, the first men to land on the moon, plant the U.S. flag on the lunar surface. This frame from Aldrin's panorama of the Apollo 11 landing site shows Armstrong on the lunar surface.