This may be a dirigible (powered balloon) or a CGI effect, but it may also be another sort of object altogether, under an unknown form of power. If it’s a computer graphic, it’s a good one. (Can you spot a telltale that it may be?) As soon as your Out There editor saw this, I thought to myself: if the classified "TR" stealth aircraft in Whitley Strieber’s book the Grays is real, this is what it would look like.
For some expert opinion, click here.