Movies in the vein of 'Gravity': tense space-based thrillers in which one of the manifold things that can go wrong on a space mission inevitably does, leaving the crew stranded and understandably a bit miffed at Houston.
Sick of sci-fi blockbusters with big-budgets and no brain? Then look no further than this collection of modern indie masterpieces guaranteed to make you ponder time, space, and everything in between. At least a couple gems you've never heard of guaranteed!
Movies in the vein of Interstellar: These cerebral sci-fi masterpieces are guaranteed to get you thinking about time, space, destiny, free-will, and pretty much every other insoluble existential mystery. The thinking man's blockbusters!
Webster's English Dictionary defines hard science fiction as being 'characterized by an emphasis on scientific accuracy or technical detail or both' (just kidding it's Wikipedia). So, basically sci-fi that would satisfy 'Comic Book Guy' from The Simpsons.