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Apollo 5 (launched January 22, 1968), also known as AS-204, was the uncrewed first flight of the Apollo Lunar Module (LM) that would later carry astronauts to the surface of the Moon. The Saturn IB rocket bearing the LM lifted off from Cape Kennedy on January 22, 1968.
Kennedy Space Center, operated by NASA, has two launch complexes on Merritt Island comprising four pads—two active, one under lease, and one inactive.From 1967 to 1975, it was the site of 13 Saturn V launches, three crewed Skylab flights and the Apollo–Soyuz; all Space Shuttle flights from 1981 to 2011, and one Ares 1-X flight in 2009.
The AS-204 rocket was used to launch the uncrewed, Earth orbital first test flight of the Apollo Lunar Module, Apollo 5, from LC-37 on January 22, 1968. After significant safety improvements were made to the Command Module, Apollo 7 was launched from LC-34 to fulfill Apollo 1's mission, using Saturn IB AS-205 on October 11, 1968.
This crewed flight was to have followed the first three uncrewed flights. After the fire which killed the AS-204 crew on the pad during a test and training exercise, uncrewed Apollo flights resumed to test the Saturn V launch vehicle and the Lunar Module; these were designated Apollo 4, 5 and 6. The first crewed Apollo mission was thus Apollo 7.
A free-return trajectory may be the initial trajectory to allow a safe return in the event of a systems failure; this was applied in the Apollo 8, Apollo 10, and Apollo 11 lunar missions. In such a case a free return to a suitable reentry situation is more useful than returning to near the Earth, but then needing propulsion anyway to prevent ...
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The distance to the Moon is calculated approximately using the equation: distance = (speed of light × duration of delay due to reflection) / 2. Since the speed of light is a defined constant, conversion between distance and time of flight can be made without ambiguity.
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