At the heart of our Milky Way galaxy lurks a supermassive black hole about four million times the mass of the sun, called Sagittarius A*. In fact, these objects, which increase in mass over time by eating material that wanders too close,

The discovery of the supermassive black, thought to be within 1.5 billion years after the Big Bang, gives astronomers new insights into how black holes might have grown so rapidly in the early Universe.