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Other Clouds
- Arcus
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- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
- Undulatus
- Velum
- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
- Cloudbow / Fogbow
- Corona
- Crepuscular rays & shadows
- Diffuse arcs
- Green flash
- Glory
- Halos
- Helic arc
- Infralateral arc
- Iridescence
- Lower Sun Pillar
- Lower Tangent Arc
- Moonbow
- Moondogs
- Parhelic circle
- Parry antisolar arcs
- Parry arc
- Parry infralateral arc
- Parry supralateral arc
- Rainbow
- Sub parhelion
- Sub-sun
- Suncave parry arc
- Sun dog (Parhelion)
- Sun pillar
- Supernumerary bows
- Subparhelic circle
- Supralateral arc
- Upper tangent arc
- Wegener arc
Undulatus in the sky over Taichung, Taiwan
Circumhorizon Arc over Northern California, US
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Contrails and a slice of the moon after sunset over North Devon, England
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Cirrus clouds with an intersecting contrail over Loggerheads, Staffordshire, England
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Contrails (Homogenitus) populate the sky near the Baltimore Airport, Maryland, US
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Reflections at sunrise over Twin Lakes, Columbia, Missouri, US
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Crepuscular rays with an accent of a contrail over North Brunswick, New Jersey, US
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Multiple contrails over Falls Church, Virginia, US
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An "X" marks the spot between these two contrails, spotted over Taipei, Taiwan
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Contrails and its remnants high in the sky over Taiwan
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Circumhorizon Arc spotted over Antelope Valley, California, US
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Contrails intersecting with cirrus fibratus, which could be the remnants of contrails themselves, spotted over Taiwan
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A depiction of the contrast between cumulus clouds and the blue sky, spotted over Momochi Seaside Park, Fukuoka City, Japan
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Undulatus that looks like stripes in the sky, spotted over Southern Vermont, US
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Altocumulus lenticularis on a cold and windy day near East Tisted, Hampshire, England
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A "firebird" in the sky over Cirencester, Gloucestershire, England
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