Marooned (1969) - 7 mistakes

Revealing: Early in the film Gene Hackman tests a rocket-powered backpack outside the space station. He slowly spins sideways through a complete circle, but instead of each side of his body being lit up in turn as it's pointed towards the sun, the light stays constant throughout the maneuver, showing that the makers just took a photo of Hackman and rotated it.

Continuity: Rescue astronaut Dougherty uses a large back-pack style unit to propel himself from his rescue ship over the the open hatch on the marooned 'Ironman 1' capsule. Just before he is about to attempt to lower himself through the open hatch of 'Ironman 1', his back-pack unit is instantly missing, and nowhere to be seen outside the spaceship. There is no way the bulky backpack unit would have allowed Dougherty through the small hatch.

Character mistake: As Flight Director Keith is informing rescue-astronaut Dougherty about the impending hurricane before the rescue launch, Dougherty exclaims "Your'e right Buzz.it's impossible" The character of 'Buzz' Lloyd is an astronaut that is marooned up in space, on another spacecraft. He should have said "Your'e right, Keith", or something to that effect.

Continuity: Rescue astronaut Dougherty wears a red helmet with a large, single white stripe running down the middle from back-to-front. Once inside his space vehicle the stripe disappears, but shows up once again once he exits the ship in space.

Factual error: The technicians at Houston's Mission Control center are discussing the physical condition of the stranded astronauts, and one of them makes the statement that astronaut 'Stoney' has "lost 16 pounds". It would be impossible to make that determination considering that they are in a zero-G environment and there would be no way to 'weigh' anything.

Continuity: The Russian spaceship approaches the stranded 'Ironman 1' capsule, and as it moves across and fills the screen, it blocks the bright sun directly behind it. The following shot shows it moving away from that position and the sun is now nowhere to be seen.

Factual error: In nearly every scene depicting someone or something in weightlessness (zero gravity), objects tend to start moving randomly without any initial propulsive force or, when already in motion, to been seen to randomly change direction of movement with no outside force acting upon them. Both of these are impossible in a true zero-G environment.