The Andromeda Nebula is a Russian film released in 1967 and based on the novel by Ivan Yefremov.
The film was originally intended to be the first of a sequence with its extended title being; Episode 1. Prisoner of the Iron Star. Unfortunately nothing came of this greater plan and so it remains a singular tale.
The good crew of the spaceship; Tantra, while exploring uncharted space, are caught in the gravitational pull of an Iron Star (?) and are trapped there for several years. Slowly the crew are then diminished by alien predators who can consume the flesh of the humans through their space suites. And what nice space suits they are too.