The first crewed Moon landing happened on July 20, 1969

At 20:17 UTC on July 20, 1969, the lunar module Eagle touched down in the Moon’s Sea of Tranquility — but the final minutes were anything but smooth. As the spacecraft descended, its guidance computer began flashing “1202” and “1201” program alarms, signaling it was overloaded with data. In Houston, a young controller confirmed within seconds that the alarms were non-fatal, and the descent continued.

Then Neil Armstrong saw the automated target was steering them toward a boulder-strewn field beside a crater. He took semi-manual control, flying the lander downrange to smoother ground and setting down with only seconds of fuel margin left in the tank. His first words from the surface were quietly historic: “The Eagle has landed.”

About six and a half hours later, Armstrong stepped onto the surface — the first human to stand on another world — declaring “That’s one small step for [a] man, one giant leap for mankind.” An estimated 600 million people, a fifth of humanity at the time, watched the grainy broadcast live. Buzz Aldrin soon followed, while Michael Collins orbited alone aboard the command module Columbia.

The crew spent roughly 21 hours on the surface and collected about 21.5 kg of lunar rock. They also left instruments behind — including a laser retroreflector still in use today, which lets scientists bounce lasers off the Moon and measure the Earth–Moon distance to within a few centimeters. The plaque they planted read: “We came in peace for all mankind.”