It's not a literary film at all, it's not a science fiction film, it's a film with many metaphors that can induce some kind of mental illness
perception,
1. The protagonist may not go to Neptune at all, or to the moon or Mars at all. There is a lot of subconscious mind, intertwined with reality, delusions, etc.
2. The protagonist may have gone to Neptune, but he never saw his father. His father died long ago, and the subconscious mind, reality, delusion, etc. are intertwined.
3. It is suitable for patients to watch in a mental hospital to evaluate the treatment effect
View more about Ad Astra reviews