We’ve all heard of Black Holes and as of yesterday a lot of us have seen a photo of one so you probably have an idea of what they are in your head.

But in reality nobody has ever ever encountered one and our most fundamental laws of physics break down somewhere within them.

So how much do we actually know about Black Holes?

Chris Impey is Professor and Deputy head of the department of astronomy at the University of Arizona and Author of Einstein’s Monsters:The Life and Times of Black Holes. He joins Jonathan

First aired 08/12/2018