The phenomenon, rarely seen outside polar regions, was spotted by astronomer Dr Jacqueline Mitton, 60, near her home in Cambridge.Rainbows are caused by light penetrating raindrops.
But the inverted type, called a circumzenithal arc, happens when sunlight bounces off ice crystals high in the atmosphere sending the rays back up.
Dr Mitton said: “It was amazing.”
Source: The Sun
