UPDATE: A curious object spotted above Queens Park has left both an amateur photographer and a world-renowned astronomer scratching their heads.
Toowoomba man Stephen Kirby was taking part in an activity with Toowoomba photography group when he inadvertently snapped the object.
"I didn't see it when I took the photograph but when I got home and had the photograph on the screen I noticed it," Mr Kirby said.
"It left me wondering what it was."
Mr Kirby captured the image on his Sony A350.
He then enlarged the image and had the photograph printed.
The developed image revealed a green-hued disk shaped object, with trail of white cloud-like smudges closely behind.
"The people at the photo shop couldn't explain it either."
University of Southern Queensland's world renowned astronomer Professor Brad Carter said the image was certainly "curious".
"I'd agree that it is 'unidentified', but whether it's flying or floating, I don't know," Professor Carter said.
"There's a great adage in science that says extraordinary claims require extraordinary evidence.
"So, whatever it is I wouldn't be assuming it's a flying saucer or alien spacecraft."
Professor Carter said the object did not appear to be an astronomical one due to the cloudy weather.
"I think we will leave it up to the experts in the field to identify what it could be."
Mr Kirby is looking forward to heading to the Toowoomba cemetery with his photography club this weekend.
EARLIER: A Toowoomba photographer snapped this unidentified flying object over Queens Parks on Sunday, March 10 at 5.30pm.
He photographed the object during a meet-up of the Toowoomba Photography Club.
Did you see the object? Or perhaps you have had your own experience with the unknown?