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Main Cloud Types
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- Altostratus
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- Cirrocumulus
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- Nimbostratus
- Cumulonimbus
Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
- Diamond dust
- Distrail
- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
- Humilis
- Incus
- Intortus
- Lacunosus
- Lenticularis
- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
- Nebulosus
- Noctilucent
- Pannus
- Perlucidus
- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
- Spissatus
- Stratiformis
- '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
A beautiful juxtaposition of the sky and nature, taken by Modestino in memory of his wife, Rossella, who recently passed away. Modestino describes this photograph as "evocative", which was taken at the cemetery in Mercogliano, Italy.
A sliver of blue sky between the cloud layers near Taft, British Columbia, Canada
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Contrail headed towards the horizon near Moscow, Russia
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Cirrus uncinus over Melksham, Wiltshire, UK
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Cumulonimbus over Situk debris field (historical), United States
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A hole in the sky over Lagrangeville, New York, US
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A magnificent reflection of Cirrus radiatus over Svalbard, Norway
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Asperitas over Vermontville, New York, US
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Mixed sky at sunset over Monte Porzio Catone, Rome, Italy
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Cirrus uncinus expanding outward over Eugene, Oregon, US
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The number three outlined within the Cirrus clouds over Erm, Netherlands
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Sun Dog over Yarra Glen, Australia
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Cumulus congestus towering upwards toward potential cumulonimbus development over Springfield Township, Pennsylvania, US.
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Fluctus (Kelvin-Helmholtz) formation over Bigfork, Montana, US
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22-degree lunar halo over Maitland, Australia
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Lacunosus over Cotia, São Paulo, Brazil
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