black ring in the sky

A schoolgirl was stunned when she saw at the sky an enormous unexplained black ring. The spectacle, which took place near Leamington Spa on Friday evening, has stumped officials.   Watch the video…

“Georgina Heap, 16, was playing tennis with mum Jo when she was stopped in her tracks by the fascinating sight. Gazing into the sky, the pair saw a clearly defined black circle which looked like a giant smoke ring. The ring remained there for around three minutes before disappearing completely.”

According to io9, Sharon Hill explains over at Doubtful News, “it was likely a vortex ring, essentially a very thick, dark smoke ring caused after an explosion.” Hill writes:

As noted in this excellent piece, this Leamington Spa ring behaves in the way that others have behaved, travelling “at a constant speed, maintaining the same horizontal or vertical position until they break up.” See more examples at that site too.

via io9