The music played on piano after the derelict ship explodes is "Part One: Introduction" from "King David", aka "Le Roi David," composed by Arthur Honegger.
Incident with the old terrestrial ship practically in accuracy corresponds to a fragment from the novel by Stanislaw Lem "The Magellanic cloud".
The original Czech version won the main prize at the 1963 Trieste International Science Fiction Film Festival.
The (then) newly restored original Czech version was screened as a "Cannes Classic" at the 2016 Cannes Film Festival.
The Czech Film Archives has undertaken a digital restoration of the original Czech version.