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The film Interstellar, directed by Christopher Nolan, has left its mark with its breathtaking images. Having benefited from the advice of a physicist, the film manages to pay a beautiful tribute to one of the most fascinating objects in the universe: the black hole. But is this film as realistic as it seems? To build his story, didn't Nolan "negotiate" a few small arrangements with Einstein? What information can we deduce from the worlds presented? During this conference we will investigate for the pleasure of understanding a little physics and to realize that, decidedly, the universe is a very curious place.