Corrected entry: When Jim's wife has a nightmare about the mission going horribly wrong, she wakes up suddenly and there is a closeup of a brown eye looking around frantically. The actress has blue eyes in the rest of the film.
Corrected entry: When Swigert is being brought up to speed in the simulator (the re-entry simulation with the false indicator light), the Capcom announces loss of signal, but a few seconds later (right after the corridor light), the astronauts are talking to Houston again. (Note: this is far too soon for them to have come out of the blackout, since, according to the end of the movie, the blackout usually lasts around three minutes.)
Corrected entry: During the launch countdown, the voice-over says "7.6.ignition sequence starts.3.2.1." The sequence is supposed to be in real time, but "6" and 3" are only about a second apart.
Corrected entry: At the meeting where Jim Lovell is informed that Ken Mattingly has been exposed to measles, and must be replaced by Command Module backup pilot Jack Swigert, Lovell complains about the last minute switch and says, "When's the last time he was in a simulator?" But Lovell eventually agrees, Swigert is put into service for Apollo 13, and he proceeds to intensify his training schedule. In one later scene he's shown in a simulator, being rather rusty and out of practice. But in an earlier scene, before the measles scene, the whole Apollo 13 backup crew, including Jack, were shown arriving at the simulator for practice. In reality, as a member of the backup crew, Swigert was in constant training and would not have even been considered were he unable to pilot the spacecraft.
Corrected entry: At the beginning, when they are discussing the Apollo 1 fire in January 1967, they state that 18 months after the fire Apollo 11 lands on the moon. In actuality, it is 30 months (2 1/2 years) after the fire that Apollo 11 lands on the moon.
Corrected entry: At one point on the return to Earth when they're about to make another burn, Lovell (Tom Hanks) looks out the window to his left at a stream of smoke or gas flowing by. At the left bottom corner a hand of the crew or someone outside of the ship is quickly noticeable, but even more so when you watch the scene in slow motion. The hand moves slightly, then quickly moves from the window as if the crew member realised what he was doing. (01:41:35)
Corrected entry: In the scene where the media is asking about the CO2 problem, Deke Slayton is sitting to the right of the NASA director, but at the same time mission control is telling the astronauts how to make the filter and when they finish you can see him patting one of the guys on the back. Somehow he is in both places at once.
Corrected entry: In the very beginning when we see Apollo 1 on the pad, astronauts Grissom, White, and Chaffee get in and there is a fire. In the film, the fire is started by a button they press, but in reality the investigation concluded that the most likely cause was a spark from a short circuit in a bundle of wires that ran to the left and just in front of Grissom's seat. (00:01:05)
Corrected entry: While Lovell is shown in the film using the Earth as a point of reference, Lovell actually used the sun.
Corrected entry: When Gary Sinese is trying to figure up a power-up checklist for the command module, there is talk there is not enough power. Two men yell that it is four amps. This is discussed in the book, and it was not four amps, it was more like thirty. The power loss was caused by an automatic system that tapped the reentry batteries in case of main power failure in the service module. I assume this was changed to four amps to heighten the emotional strain (four amps is more critical than thirty.).
Corrected entry: Just after the explosion, there is a shot of Odyssey's instrument panel with the mission timer reading 91 hours and 34 minutes. The accident occurred around 56 hours into the flight. The next time the mission timer is seen, it reflects the proper time.
Corrected entry: When they're approaching re-entry, the people at mission control are blaming the shallowing of the trajectory on the lack of moon rocks. In real life, the shallowing of the trajectory was caused not by lack of rocks but by steam venting from the LEM's cooling system, as the book correctly points out.
Corrected entry: The explosion was not actually felt by the crew but in the film we see them thrown about in the cabin.
Corrected entry: In several shots where the Apollo capsule is shown traveling through space, the shadow of it is clearly visible on the starry background.
Corrected entry: The movie is set in 1970 when all telephones in the USA were analogue and had a fixed connection. However, in the movie, the phones used are connected to modular jacks (the kind used everywhere for digital connections and that can be pulled out of the socket).
Corrected entry: As the spacecraft disappears behind the moon you can hear Swigert (Kevin Bacon) saying "see you on the flip side" and a shadow begins to fall across his face. Assuming the spacecraft's attitude wasn't changing at the time, the only way a shadow (presumably of the moon) would have fallen like this would have been if the moon's phase was full or close to full, as seen from earth. The lunar landings were planned for times when the sun was low in the lunar sky, to avoid intense surface heat, thus the moon was usually a crescent as seen from earth.