I’ve seen Interstellar about 13 or 14 times now. It’s an absolutely beautiful movie and it’s very well crafted. What Interstellar does is very much the embodiment of the quote by Mark Twain that says, “Get your facts straight first, then you can distort them as you please.” The film had guidance from and was produced by real physicist Kip Thorne who went on to explain the science of time dilation and tidal waves and gravitational slingshots in his book. It goes into detail about why certain science worked out the way it did in the movie even if some things are seemingly confusing at first. Of course, the film is also known for having some of the most accurate depiction of black holes and wormholes.
At the end of the day we have to remember it is a movie and it needs drama and striking visuals that aren’t always going to be the most realistic. Interstellar doesn’t get every bit of science right nor is the plot necessarily 100% possible but it tries to stay as close to the truth as it can while still being entertaining and delivering a complex, riveting story. As a sci-fi film, it very much puts an effort into its science and that’s worth appreciating.