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Optical Effects
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A mammatus formation, spotted after an intense storm over Walpole, New Hampshire, US.
A sunset over Porthtowan, Cornwall, UK.
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A primary and secondary rainbow over Waynesburg, Pennsylvania, US.
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A sunset over Beijing, China.
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Storm clouds gathering over Raccoon Park near Pittsburgh, Pennsylvania, US.
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Cirrus over Alto, United States
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Pyrocumulus clouds over the Carson and Santa Fe National Forests, viewed from Dixon, New Mexico, US.
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A section of lunar halo over Sumirago, Varese, Italy.
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After sunset over Torrejon de Ardoz, Spain.
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A sunset over Tainan, Taiwan.
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A circumhorizon arc displaying in a contrail over North Hollywood, California, US.
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Crepuscular Rays over Sprague, Canada
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Corona over Ash, United Kingdom
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A sunset over Taipei City, Taiwan.
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A head in the clouds over Brayhead, Ireland.
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