61: Biggest Bang Eva!

Astronomers have spotted a void, a cavity, a big hole in the intergalactic stuff in a cluster of galaxies far away. And this thing is big. Very big — fifteen Milky Way Galaxies across. The void was created by a stupendously energetic jet erupting from a Super Massive Black Hole in the centre of one of the galaxies, and when they did the maths, the researchers realised they were looking at the aftermath of the biggest explosion since ... well, since the Big Bang itself!