i have a 1680 book of the history of dresden, germany. there is a description of three objects that appeared in the sky in 1620 with an apparent exchange of light rays and smoke and noise between the larger round object and the two smaller ones round ones on either side. the population who witnessed this were quite frightened. the objects remained for many hours and then disappeared. i can send you a copy of this page and my translation of the german article, if you like. bernd klopfer the date of the event above is invalid but you required a date and i couldn't enter the correct date.