Apollo 13

Other mistake: When Apollo 13 lifts off, you hear a voice saying something like 'Houston we have cleared the tower at 13:13'. However, when this is said the Saturn V rocket has nowhere near cleared the tower.

bladesman_joe

Factual error: Technician John Aaron states that the damaged ship will need to use "less amps than this" as he points to a vintage 'Mr. Coffee' coffee-maker on his desk. Mr. Coffee was not introduced until 1972.

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Marilyn Lovell: Naturally, it's 13. Why 13?
Jim Lovell: It comes after 12, hon.

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Trivia: The exchange between Lovell and his wife about holidays ("you know that Easter vacation? There's been a change of destination ... how about the moon?") in fact took place in 1968, when Lovell was assigned to Apollo 8 and so missed his planned Christmas vacation.

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Question: Why did the Apollo 13 spacecraft need a parachute? They were landing on water not solid ground. It's easier to survive a fall when landing on water, so why would they need a parachute if they were landing on water?

Answer: Spacecraft re-enter Earth's atmosphere at extremely high velocity (thousands of miles per hour). Atmospheric friction slows the spacecraft descent somewhat; but, without parachutes, the Apollo spacecraft would still reach the surface traveling at hundreds of miles per hour. Landing in water at such high speed would be like hitting concrete, which would of course be instantly fatal. Hence the necessity of multiple parachutes. The Apollo program (and all early U.S. manned space programs) chose to land in the ocean for two reasons: 1) It was easier to track spacecraft re-entry from horizon-to-horizon at sea without visual and radar obstacles, and; 2) It was faster and easier to position several Navy vessels in the general splashdown location, then deploy helicopters to rapidly retrieve the astronauts and their spacecraft.

Charles Austin Miller

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