Jason Colavito has a worthwhile post on this infamous “proof” for UFO visitation. The whole idea of a “UFO Battle” derives from the woodcutting shown here (courtesy of Wikimedia commons). Jason’s post tells you a few things about the origins of the woodcut that the UFO community won’t tell you, so have a look!
Personally, it looks more like “Battle of the Gum Drops and Pez Dispensers” to me.
Colavito can’t even be bothered to paraphrase someone else’s translation of the woodcut’s text, one translation of which can be found here http://unitedcats.wordpress.com/2012/03/13/1561-ufo-battle-over-nuremberg/ which sure doesn’t sound like a description of sun dogs, either! I found the translation in under a minute, and more time and effort would probably secure a transcription of the original, which I COULD translate if I had the time right now. In any case, the woodcut arguably supports neither the Ancient Astronaut hypothesis nor a casual debunking. And let’s not even begin to reflect on the problematics of interpreting visual and textual representations from the Renaissance!
Last line — well said!