It's not easy growing a supermassive black hole

Talk Abstract

When we think of black holes, we often think of them as endless hoovers, sucking up anything around them. In reality though, it's very difficult to grow a black hole; to get matter close enough to that point of no return. Instead, most matter will happily orbit a black hole. Just like the Earth orbits the Sun, the Sun orbits a supermassive black hole at the centre of the Milky Way over 4 million times more massive than the Sun itself. So if it’s difficult to grow a black hole, how in the universe did supermassive black holes like this get so big?