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If Pigs Could Fly – A Quick Guide to Solar Halos and Other Curiosities
A circumscribed halo encloses the more common 22-degree halo around the sun Saturday morning (May 17). Six-sided pencil-shaped ice crystals in cirrostratus clouds created the fine display. Credit: Bob King
Call it a porcine occultation. It took nearly a year but I finally got help from the ornamental pig in my wife’s flower garden. This weekend it became the preferred method for blocking the sun to better see and photograph a beautiful pair of solar halos. We often associate solar and lunar halos with winter because they require ice crystals for their formation, but they happen during all seasons. (…)
Read the rest of If Pigs Could Fly – A Quick Guide to Solar Halos and Other Curiosities (869 words)
© Bob King for Universe Today, 2014. |
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Post tags: 22-degree, halo, ice crystals, sun, sundogs, tangent arc
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Source: http://www.universetoday.com/111964/if-pigs-could-fly-a-quick-guide-to-solar-halos-and-other-curiosities/
