The blue light light up the sky and then disappeared as if it came out of nowhere.This blue light that was unremarkably beautiful filled a small area of the sky. It came so fast and I just happened to look up and see it. I didn't here any sounds that would have encouraged me to look up into the sky. I was just driving home and for some reason I did. The light didn't seem to stay in one place, (it kinda grew and then shrunk) and then it just disappeared. At first I thought perhaps I was seeing things, but my friend said that they had seen it too. I have never seen anything so beautiful that sends chills up my spine at the same time.