10 unsettling astronomical incidents and phenomena

https://www.youtube.com/watch?v=pul9r0jfbug&list=PL1WRbGpKFCAJMfdKHM-zwe5qecY3r910n&index=11

This is a video by the excellent as always Mr John Michael Godier listing, and explaining, some unsolved astronomical phenomena. While the general rule is that “it is never aliens, until it is,” some of the phenomena listed are so strange that aliens remain a serious possibility. One of these is the Wow signal, which to this day defies explanation, it was recently proposed it may have been due to comet emissions, but this was shot down by the scientific community because if comets were emitting at the hydrogen line radio astronomers would have noticed it by now.

I recommend giving it a watch, it’s a good reminder there’s lots we still don’t know about our universe.