What looked like a rainbow had formed a complete circle around the sun. The ring was pale, bright, and almost perfectly round. But it was not a rainbow at all—it was actually a 22-degree solar halo. This brief, beautiful display tells us that precise geometry and dependable physical laws can turn countless tiny ice crystals into visible order and beauty.
Solar halos often form in thin cirrus or cirrostratus (wispy and thin)…
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