December 19, 2005

Solar Halo

Today we received a real treat, we witnessed a solar halo. The first one any of us have ever seen. For those unfamiliar - a solar halo is like a rainbow that circles the sun. It is beautiful and frequently happens when very cold (like today) as the cold affects the crystals in the air and refracts the light to form the halo (oversimplified explanation).

For more information and some cool pictures check out:

Atmospheric Optics
AStronomy Picture of the Day
UIC Astronomy Dept

Marry Christmas,

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