There is definitely stuff out there that cannot be explained. Late one night about 25 years ago whilst walking to my shed at the end of the garden I noticed how amazingly clear the night sky was, I could see nearly every star it was so clear and crisp. To the west low on the horizon I noticed a solid green light probably many hundreds of miles away, suddenly it dashed horizontally from its stationary position in an arc right across the sky to the other horizon in the east in a matter of 2-3 seconds and went out of sight.
I stood there totally stunned for a few minutes nervously shaking in the freezing winter night. Nothing man made could move that quick, I’m sure of it. To this day I still don’t know what the heck it was. You just don’t talk about this sort of thing for fear of being called crazy or making up stories. Never heard of anything similar either. Now I’m a believer.