On July 20, 1969 the lunar module Eagle separated from the command module Columbia. Collins, alone aboard Columbia, inspected Eagle as it spun before him to ensure the craft was not damaged. About 300 ft. above the Moon’s surface, Armstrong noticed that they were heading towards a boulder strewn crater and took over from the computer to guide the computer to guide the module to a flatter area. Buzz Aldrin spoke the first words from the lunar module on the lunar surface. Throughout the descent Aldrin had called out navigation data to Armstrong, who was busy piloting the lunar module. As Eagle landed Aldrin said, "Contact light! Okay, engine stop, ACA - out of detent." Armstrong acknowledged "Out of detent" and Aldrin continued, "Mode control - both auto. Descent engine command override off, Engine arm - off. 413 is in.” Then Armstrong said the famous words "Houston, Tranquility Base here. The Eagle has landed."
It took six hours of rest and preparation before Armstrong and Aldrin were ready to climb out of the module. At 02:56 UTC on July 21, Armstrong made his descent to the Moon's surface and spoke his famous line "That's one small