Factual error: In the PALOMINO scenes, Anthony Perkins wears a long lab coat. In most of the scenes, it hangs straight down; but in the low gravity aboard the ship it should be flattering about (that's why such loose garments are not worn by real-life cosmonauts; they would be a hindrance).
Factual error: The toy horse on Alec's shelf is a 64 Black Foundation Stallion, available from Breyer between 1977-1987. But the film is set over thirty years earlier.
Factual error: When Dave is "true"ing his wheel, he adjusts one spoke with 3 full turns. That wheel would not be rideable after that much adjustment on one spoke.
Factual error: In 1947, when George is 14 years old his father takes him to the clinic for a physical examination. This is about 18 minutes into the movie. The nurse measures his blood pressure using a cuff that is held on with a "Velcro" hook-and-loop fastener. Velcro wasn't marketed until the early 1960's. [A new DVD was released in 2014. The sound track in this scene was edited and we can no longer hear the sound of the Velcro being unwrapped.]
Factual error: The TV remotes of the day wouldn't control more than one TV at a time, yet they all come on and go off at the same rime.