- A cirrostratus cloud is a high-level, ice-crystal cloud that forms as a thin, transparent veil covering much or all of the sky.
o - Contain millions of tiny ice crystal clouds – the hola (“rainbow ring”) ~ you see are caused both by both refraction, or splitting of light from these ice crystals from the Sun at day or from the Moon at night.
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- “Milky” transparency at day time

- “Milky” transparency at night time
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Images of Cirrostratus by Derek Rowley



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