There are no limits when it comes to hard sci-fi. The following movies are proof of the essence of the genre, which allows us to see the inexplicable.
We took a trip through decades of the genre and came up with a list of the most important and best hard science fiction movies of all time. They are the essence and the foundations of the book of sci-fi rules that's still being written as we, the audience, become much more self-aware of our relationship with technology, the future, and whatever those two will bring.
That's very subjective. I hate Interstellar because I think it's laughably dumb but many other people have a raging hard-on for that shitty movie. Ad Astra was very weird and very boring, but I liked the interesting visuals.