'Film' is used at 24 frames every second in the theater, 112 feet every minute. 99% of movies are recorded at that speed. 2001 & Star-Wars space shots were filmed one frame per second, Star-Wars assembled all the things in the scene later. 2001 did not have computer motor control, so Kubrick did everything N times for each thing in the final scene, within the camera. Planet; run by 10 times with 10 fresh rolls of film, then add stars with 9 of the SAME rolls, then foreground object (surface of Moon or hotel) 8 times, then spaceship 7 times, until all are recorded on the remaining single roll of film. No-One can look at the result until the film is developed (souped) so the only way to test for success is to develop one roll with each new added thing. Any thing wrong and you do it 10 times all again......at one inch of film per second. Thus is why the Star-Wars teaser on Christmas of 1976 had No space shots; the droids jumping ship was mica dust and were dropped from a forklift, the spinning Empire destroyer was a cut-out Polaroid taped to a plastic star field contraption.