Some pretty fabulous atmospherics via my dear friend Josh Kirk!
I love these sorts of displays and they happen more often than people think.
The poster wonders if it shows a stargate.
Who knows, man? Can not jump to the ultra exotic (the A word) as we do not have an understanding of every natural affect that can come to be.
What we need to do is put a lot more effort into understanding what is happening.
Enjoy!
Peace.