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Nereide
drnereide.bsky.social
did:plc:5odp2okktic3ychbdqiw3kxi
a circular arc with a radius of 42° centered on the antisolar point. In contrast, a circumhorizontal arc requires plate-shaped, hexagonal ice crystals in cirrus clouds, aligned horizontally to refract sunlight. This happens only when the Sun is 58° high or greater above the horizon,
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2025-10-11T08:07:43.217Z