A me mi piace l'itagliano
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| Website | https://www.giorginolab.it |
| Google Scholar | https://scholar.google.it/citations?user=6uFYeoAAAAAJ&hl=it |
| GitHub | https://github.com/tonigi |
https://en.wikipedia.org/wiki/Circumzenithal_arc
The circumzenithal arc, also called the circumzenith arc (CZA), the upside-down rainbow, and the Bravais arc, is an optical phenomenon similar in appearance to a rainbow, but belonging to the family of halos arising from refraction of sunlight through ice crystals, generally in cirrus or cirrostratus clouds, rather than from raindrops.