Hevelian halo

Hevelian halo
/heuh vay"lee euhn/
a faint white halo with an angular radius of 90° that is occasionally seen around the sun or the moon, thought to be caused by the reflection and refraction of sunlight by ice crystals.
[after J. HEVELIUS; see -IAN]

Useful english dictionary. 2012.

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  • Hevelian halo — /heuh vay lee euhn/ a faint white halo with an angular radius of 90° that is occasionally seen around the sun or the moon, thought to be caused by the reflection and refraction of sunlight by ice crystals. [after J. HEVELIUS; see IAN] * * * …   Universalium

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