Incomprehensibly big

Astronomers have discovered the biggest explosion in the universe since the Big Bang, in a galaxy far away. An explosion five times bigger than any explosion known so far has been discovered in the Ophiuchus galaxy cluster 390 million light-years from Earth.

“The best I can do is tell you that if this explosion continued to occur over the 240 million years of the outburst - which it probably didn't, but anyway - it'd be like setting off 20 billion, billion megaton TNT explosions every thousandth of a second for the entire 240 million years. So that's incomprehensibly big. Huge."