The latter. Unlike Schwarzschild black holes, a Kerr black hole drags spacetime with it as it rotates. The black hole in Interstellar was a Kerr black hole. h

The latter. Unlike Schwarzschild black holes, a Kerr black hole drags spacetime with it as it rotates. The black hole in Interstellar was a Kerr black hole. https://en.wikipedia.org/wiki/Kerr_metric https://en.wikipedia.org/wiki/Kerr_metric