Which of the following would be brighter, in terms of the amount of energy delivered to your retina…
1. A supernova, seen from as far as the sun is from the earth, or
2. A H-Bomb detonated while pressed against your eyeball?
The answer is the Supernova, by about NINE orders of magnitude.
The Supernova rule of thumb?
However big you think Supernovae are, they’re bigger than that.