The black ring phenomenon has been captured with increasing regularity, baffling experts and prompting UFO enthusiasts to cite alien activity or even a portal to another dimension.
And while those claims may be beyond the pale for many even the experts at the Met Office have no more concrete explanation.
The latest sighting took place in Birkenshaw, West Yorkshire, and the strange circle seems to resemble a giant smoke ring – but there seems no possible source and local fire services say that there were no reports of blazes on the day of the incident on Sunday, July 9.
The image was taken by 22-year old Kimberly Robinson, who said: “Me and my boyfriend were driving … and noticed a black flying ring in the sky.
“It looked a bit smoky but the shape was a solid ring.
“We hadn’t ever seen anything like this before.
“We have looked into it and no one knows what it is.”
A spokesperson for the Met Office confirmed that they do not believe that it is a natural phenomenon.
They said: “We have had a look at it and cannot think of anything metrological that would have caused such a phenomenon.
“It does not appear to be anything at ground level that is causing the smoke to rise.”
But they were wrong!
A high level Express investigation has revealed that the black ring was actually down to a World War II battle re-enactment that took place in the area that day.
Sarah Clarke, an organiser for the Yorkshire Wartime Experience, told Express.co.uk that the ring is actually a plume of smoke from the pyrotechnics of the battle reenactment.
She said: “We had our WWI re-enactment on the Saturday and our WWII one on the Sunday, and that plume is actually from the WWII battle.”
But, the war re-enactment does not explain similar rings which have appeared over the UK and across the world.
In April, onlookers in the Russian city of Novosibirsk spotted the odd phenomenon, while in 2016, one was spotted over Disneyland, California.
The numerous sightings have seen alien hunters clamouring to offer their opinions, with prominent UFO blogger Scott C Waring saying that it is a type of extra-terrestrial space craft.
He wrote about the sighting over Disneyland: “Ring UFOs are super rare, but they have been seen.
“This UFO is over Disneyland and causes the family to worry about an alien invasion.”