How much of the movie "Interstellar" is fiction, and how much is based in fact?

Interstellar deals with such concepts as the science of black holes, relativity, and space travel, to be exact, which is why renowned astrophysicist Neil deGrasse Tyson has now weighed in on the film. However, as was also the case when Tyson offered his thoughts on the movie Gravity in 2013, he’s not focused on Interstellar‘s artistic merits as a work of storytelling but, rather, in the way that it treats scientific ideas (theoretical and proven concepts alike).

The Interstellar narrative follows a team of astronauts, led by the former NASA pilot Cooper (Matthew McConaughey) and scientist/astronaut Brand (Anne Hathaway), as they undertake a dangerous space mission in the hope of finding a new planet for humanity to survive on (now that Earth’s suffering an agricultural collapse). The team ends up traveling through a wormhole to another galaxy, where they visit alien planets where strong gravitational forces affect the passage of time, among other scientific phenomena.