Working night shift I noticed an odd light across the valley. The location could be where one might see slash pile burning but only in late fall on the Mt Midgely range. The light moved down the mountain then stopped and was stationary for about a minute. I snapped a quick picture not expecting anything. I was soon astonished to see this thing begin to rise vertically slowly then up and zip away in a controlled manner to the north west. The speed was amazing. No sonic boom. This was not any conventional aircraft as we know it. Zooming in on the picture the next day confirmed this. It would be nice to know who built that machine and what they where up to.