2001: A Space Odyssey (1968)
This is a very classic movie, but it’s also a Kubrick movie. The pacing in the movie is notoriously bad, but the attention to detail in keeping the whole space thing as authentic as possible is notoriously good. Depending on what you’re looking for, this might be the movie for you. The aliens in this movie aren’t actually aliens, but more like alien-created monoliths.
District 9 (2009)
If you’re looking for a movie that protests racism and classicism in a way where no ethnicities get offended, District 9 is probably your best bet. In this movie the actual aliens are the victims of racism which allows for a bit more rawness when dealing with these issues. And the effects still hold up to this day, which is always good news.
