Never had I thought Interstellar came with a prerequisite. While the gist of the story is pretty much straightforward and simple (yes, it is), the screenplay weighs too heavily on scientific terms and theories. It isn’t providing answers, just evoking more questions (typical Nolan). It is great to have rocket science in a movie, but general audience would surely have difficulties comprehending wtf is going on. It will certainly make a lot of sense if you know basic astrophysics because Interstellar is mind-bending in a singularity level.