Sometimes, sky phenomena can surprise the hell out of you!
And this is what exactly happened for sky watchers from Texas to Maryland around 9 pm ET on Nov. 5th, when a mysterious cloud suddenly appeared in the constellation Cygus.
It had a bright core and emitted luminous spiral clouds.
Did something explode over Earth?
Sorry but it was most probably excess fuel dumped by the second stage of a Space X Falcon 9 rocket launched earlier from Cape Canaveral.