Just an F-Y-I, Kepler's supernova in 1987, that happened in a nearby galaxy, was easily visible with the naked eye. If a supernova happened within 100 light-years of earth, the gamma rays released would be enough to significantly deplete our ozone layer enough to kill potentially 50-60 percent of all currently known species on Earth from the aftereffects.Carnagath said:And a supernova THAT bright?
The first recorded supernova was around 180 AD by the Chinese, when a star suddenly outshone everything but the moon (a full moon at that) on the night sky.
Supernova are really visible if they happen anywhere nearby. As in, within this galaxy. But I doubt that was a supernova, lasted far too long and the blue light is just plain freaky. It might have been blue-shifted, but then it would be uniformly blue. Effects of the ionosphere apparently have already been discounted.
I'm mostly leaning towards a hoax or somesuch, but that is just guesswork. Far too little information is available to make an informed decision.
Oh yeah, and let's not forget the spiral.... "GIGA... DRILL... BREAKEEEEEEEEEEEEEEERRRRRRRRRRRRRR"