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Post by Jay on Jul 25, 2009 20:46:39 GMT
I took this pic of some nice optics this evening, this is the forst time i have seen the tangent arc and also i think part of the parhelic circle is visible spaceweather.com/submissions/large_image_popup.php?image_name=Jason-Evans-Copy-of-halo-display_1248553656.jpgearlier today there was cloud that really looked like daytime NLC! i think its just cirrus cloud but it was so interesting i took some pics! I beleive those optics are caused by ice crystals in the atmosphere, so are NLCs! its shame that a optical display like this couldnt be a used as a warning for possible NLCs later but i think the NLC ice crystals are a lot higher in the atmosphere, and a differnt shape (the optical ones are flattened crystals i beleive)
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Post by PeteG on Jul 25, 2009 23:52:56 GMT
very nice Jay! I saw some odd looking clouds over Wiltshire today but no optics. PeteG
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Post by markt on Jul 27, 2009 6:48:22 GMT
Nice picture Jay! I always have my eye out for rainbows, haloes & glories et al myself
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