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Rare sun halo appears

A halo around the sun, caused by ice crystals in earth's atmosphere, put in a colourful cameo appearance on Monday. According to Wikipedia, sun halos are the result of ice crystals trapped in cirrus clouds, in the lowest layer of earth's atmosphere. Photo: Boxer Ngwenya, The Star

A halo around the sun, caused by ice crystals in earth's atmosphere, put in a colourful cameo appearance on Monday. According to Wikipedia, sun halos are the result of ice crystals trapped in cirrus clouds, in the lowest layer of earth's atmosphere. Photo: Boxer Ngwenya, The Star

Published Nov 1, 2010

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A halo around the sun, caused by ice crystals in earth's atmosphere, put in a colourful cameo appearance on Monday.

“The rainbow ring around our sun is called a sun halo...just like a rainbow it doesn't last long and will probably be gone within the next hour,” Johannesburg planetarium astronomer Claire Flanagan told Sapa mid morning.

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She advised people not to look directly at the sun as it could cause eye-damage.

According to Wikipedia, sun halos are the result of ice crystals trapped in cirrus clouds, in the lowest layer of earth's atmosphere.

The crystals act as prisms, reflecting light that mimics bands of colour found in a rainbow. - Sapa

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