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In fact, within hours after the accident, Apollo 13 used the lunar module to maneuver from its planned trajectory to a circumlunar free-return trajectory. [7] Apollo 13 was the only Apollo mission to actually turn around the Moon in a free-return trajectory (however, two hours after perilune, propulsion was applied to speed the return to Earth ...
The trajectory followed by Apollo 13 Sketch of a circumlunar free return trajectory (not to scale).. In orbital mechanics, a circumlunar trajectory, trans-lunar trajectory or lunar free return is a type of free return trajectory which takes a spacecraft from Earth, around the far side of the Moon, and back to Earth using only gravity once the initial trajectory is set.
Apollo 13 (April 11–17, 1970) was the seventh crewed mission in the Apollo space program and would have been the third Moon landing.The craft was launched from Kennedy Space Center on April 11, 1970, but the landing was aborted after an oxygen tank in the service module (SM) exploded two days into the mission, disabling its electrical and life-support system.
Apollo 13 was slated to be the third landing on the moon after Apollo 8 (1968) and Apollo 12 (1969). Launched on April 11, 1970, the crew was led by commander Lovell, along with command module ...
Apollo 13 was the second mission not to use a free-return trajectory, so that they could explore the western lunar regions. [97] Using the Apollo Lunar Module as a "life boat" providing battery power, oxygen, and propulsion, Lovell and his crew re-established the free return trajectory that they had left, and swung around the Moon to return ...
Ken Mattingly, astronaut who helped Apollo 13 crew return safely home, dies at age 87. ROBERT JABLON. November 3, 2023 at 8:57 PM ... Apollo 13's story was told in the 1994 book “Lost Moon: The ...
Apollo 13: Apollo 13: 11 April 1970: Saturn V: NASA: Orbiter: Spacecraft failure Lunar Module Aquarius: 11 April 1970: Saturn V: NASA: Rescue mission: Success Lunar landing aborted following Service Module oxygen tank explosion en route to the Moon; flew past the Moon (free-return trajectory) and returned the crew safely to Earth. 79: Luna 16 ...
Such free return trajectories add a margin of safety to human spaceflight missions, since the spacecraft will return to Earth "for free" after the initial TLI burn. The Apollos 8, 10 and 11 began on a free return trajectory, [ 3 ] while the later missions used a functionally similar hybrid trajectory, in which a midway course correction is ...