265,000 galaxies in this one shot of a very small section of the night sky from Hubble. Your perpective will change as you zoom in from different spots. But all these dots of light are galaxies, not stars. (Deep sky project).
http://www.gigapan.com/gigapans/215519
So surely something is out there somewhere, or it's a pretty big waste of space.
As to UFO's, they are just that..Unidentified. My guess is the vast majority are military, atmospheric phenomena. But if the evidence ever presented itself, I have an open mind.