Nearly 7 billion witnesses, and nobody saw nuthin'...

Wow. We all need to look UP once in a while, people.

"Anyone who went outside that night and looked towards the constellation of Puppis would have seen it," Saxton says.
The Exploding Star That Everyone Missed (SPACE.com)

Maybe everybody saw a new shiny thing and chalked it up to another visiting UFO.

Or more likely, publik skrewel astronomy edukashun has utterly failed.