Every now and again something weird and wonderful happens in the sky, and for a few minutes I’m totally perplexed about what it is.
And then there’s something that makes me literally gasp and say "WHAT THE FRAK WAS THAT?"
Yeah. Check out this amazing video:
Holy Haleakala! What was that?
The footage is from a webcam mounted outside the CFHT astronomical observatory in Hawaii (another view of it from a different webcam can be found here; sadly, both webcams are on Mauna Kea, not Haleakala). You see some stars and the horizon, then suddenly an ethereal pale arc pops into view. It rapidly expands into a thin circular shell, then fades away as it fills the view. The whole thing takes a few minutes to expand; you can see the stars moving during the event (some of the pixels on the webcam are very sensitive and make stationary "hot spots" in the field of view).
So what is it? Is it a trans-dimensional portal into the future, some wormhole from the Pegasus galaxy, or two alien spaceships battling it out?
In point of fact, we are seeing something related to space war…
I first saw this video on Starship Asterisk, the discussion forum for the wildly popular Astronomy Picture of the Day website. The conversation there about this event is going pretty well, and I think this whole thing has been nailed down to a reasonable series of events. First, let’s look at a still frame from the video: