Ian,
that looks like a nice article. I've skimmed it through and I think it's a good guide about stuff that can be mistaken for UFOs. I know those things, sundogs, satellites, Jupiter, Venus (have a look at some of my YT vids, they are in there

) ... I've even seen a huge fireball with a long tail once.
Still Ian, there's stuff out there that CANNOT be explained by what is already known. I can say so because - being familiar with stuff crossing the nightsky - I've had two sightings where I have absolutely no explanation for. Unfortunately they do match popular UFO reports. One was a ''blinking fleet of UFOs'' and the other one was what I can only describe as a double explosion in space. Both sightings were completely different from what I've ever seen before, in between and after. And, probably like you, I hang around hours at night watching the sky. I KNOW if there is something that does not ''belong'' there. That fleet was very far away but it also moved very fast. And the double explosion was also quite weird. Even talked about it on a popular british astronomy forum and guess what ? They had no explanation and said ''well, then it must have been a UFO''.
So, yes, there's pretty much stuff up there that can be mistaken for UFOs (alien spaceships) but once in a while they are genuine UFOs, i.e. absolutely unidentifiable flying objects.

We are not alone. You can also ask a few former astronauts about that or former President Jimmy Carter. Someone or some ''phenomena'' is out there and we have no definite idea who they are or what it is. Some say it's God or angels. I won't go that far though
