Ranking the ~20 space epics, scifi with outer space and aliens that really is about tackling existential themes, contrast to space operas like Star Wars or Dune.
WIP: Fantastic Planet (1973), Silent Running (1972), Stalker (1979), Angel's Egg (1985), Wings of Honneamise (1987), Contact (1997), Event Horizon (1997), Sphere (1998), Mission to Mars (2000), Love (2011), Aniara (2018), Prospect (2018)