The bombs are made from an HO scale piggyback trailer kit and parts of 1/25th scale model car kits; "Matra", the name of the car, can be seen on some parts in some shots.
A computer screen flashes "FUCK YOU HARRIS" during the film. This was to Jack H. Harris, the producer, who annoyed director John Carpenter during filming and this was his revenge.
The scene in which Pinback is stuck in the service elevator with his legs dangling through the floor hatch is clearly filmed in a corridor with the lift base being pulled horizontally along it.
The space suits are made to resemble the space suit of the Mattel action figure "Major Matt Mason", which was used in slightly modified form as a miniature for effects shots.
The idea to deep-freeze the dead (Commander Powell) and be able to speak to their half-living souls through an electronic device is inspired by sci-fi short stories and novels by Philip K. Dick, in such works as "What the Dead Men Say" (1963) or "Ubik" (1969). The frost, the radio tuning and the clouded, feeble and fainting thoughts are exactly as described by Dick.
In the "elevator" sequence the bottom of the elevator is actually rolling on the floor. The device used to roll the elevator base was actually a Moviola camera dolly normally used on the small sound stage in the old USC Cinema building (itself once a horse stable). The steering end of the dolly can be seen as part of the "elevator" underside.
The space helmets used were part of Ideal Toys' "S.T.A.R. Team" toy line produced from 1968 to 1971. The helmets are obviously sized for children as is evidenced by the poor fit on the actors' heads.
The trivia items below may give away important plot points.
During the asteroid storm, when Bomb Number 20 is shown on the computer room monitor emerging from the bomb bay, the monitor shows a single frame of a man's smiling face.
After the ship blows up, a piece of debris passes behind Doolittle. The debris is marked "toilet tank thx1138" as a reference to THX 1138, another feature film adapted from a student short.
The end of the film was almost certainly inspired by and adapted from Ray Bradbury's sci-fi short story "Kaleidoscope." Bradbury's story is about a group of rocket men floating away from each other in space after their ship has exploded. Eventually only two men are left in radio contact; one of them is carried off by an enchanting, kaleidoscopic meteor swarm, and the other falls to earth as a shooting star. This situation is exactly recreated at the end of "Dark Star," and some of the dialogue is adapted directly from Bradbury's text.
While there is a visible flash and sound of some type of shot when Pinback darts the alien, in fact the gun used is a real anesthetic dart gun which uses CO2 to propel the dart and would have no muzzle flash.