Plenty of astronomical discoveries have been made by chance and by complete amateurs although methodical computer sky tracking follows mathematical hunches.
Source lost in the way back machine. Sorry!
This photo was entirely something I chanced upon as I was driving down a multi storey carpark. I noticed a glimmering pool of oil and it had no wheel marks in it so was pretty fresh. It was a slow moving day so I stopped the car and took a photo. Voila!
Maybe I am the only one who ever saw it in its native state but now you can be a witness too. The world is still so full of discoveries.