How do you take a picture of a black hole? This week Jonn is joined by astrophysicist Heino Falcke, who was part of the team behind the first-ever photograph taken of a black hole. From telescopes to weather reports, discover almost everything there is to know about black holes.

Jonn’s new book The Compendium of (Not Quite) Everything is out in hardback, eBook and audiobook now. Order your copy here: http://hyperurl.co/ha6zok

Follow Jonn on Twitter @JonnElledge.