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Moon Halo over Veszprem Castle

By: Tamas Ladanyi

 

Region: Europe

Site: Veszprem - Hungary

Date: 2012 February 2

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The 22-degree moon halo is photographed in this wide-angle view of the Veszprem Castle in Hungary. Large atmospheric halo around the Moon or the sun occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky. Each ice crystal acts like a miniature lens. Because most of the crystals have a similar elongated hexagonal shape, light entering one crystal face and exiting through the opposing face refracts 22 degrees, which corresponds to the radius of the Sun or the Moon Halo. Click on the constellation icon above the image to see a beautiful rainbow image over this historic castle. Tamas Ladanyi, Astrophoto.hu

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