Anyone who saw the 2014 space opera Interstellar will remember that planets featured in the film, visited by a crew from Earth, orbited not a star but a massive black hole called Gargantua, its accretion disc the source of heat and light. Much of the science in the film was calculated by renowned physicist Kip Thorne and indeed the treatment of black holes in the film was a source of inspiration for scientists even here in the Czech Republic.