Image:LunarIceHalos.jpg
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LunarIceHalos.jpg (640 × 443 pixel, file size: 36 KB, MIME type: image/jpeg)
[edit] Summary
This photo of ice halos around the moon illustrates a number of relatively uncommon phenomena. First, the 22 degree halo itself (which is relatively common) as well as "parhelia" (moondogs) to the sides (the left one was hidden). A upper tangent arc appears tangent to and above the 22 degree halo, and finally a "parhelic circle" (although lunar, not solar) passes through the moondogs and the moon. Parhelia, upper tangent arcs, and parhelic circles are 73, 27, and 4 percent as common as 22 degree arcs, so this is a somewhat unusual event.
Even though this photograph was taken at nighttime, some color is visible in the arcs. Joseph N. Hall
[edit] Licensing
 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
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The license above applies to this photograph at this resolution or smaller. Joseph N Hall 00:17, 1 September 2006 (UTC)
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- (del) (cur) 00:13, 1 September 2006 . . Joe n bloe (Talk | contribs) . . 640×443 (37,313 bytes) (This photo of ice halos around the moon illustrates a number of relatively uncommon phenomena. First, the 22 degree halo itself (which is relatively common) as well as "parhelia" (moondogs) to the sides (the left one was hidden). A upper tangent arc appea)
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