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Sunday, December 22nd, 2024
the Fourth Week of Advent
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Bible Encyclopedias
Anthelion

1911 Encyclopedia Britannica

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(late Gr. avOi / Xcos, opposite the sun), the luminous ring or halo sometimes seen in Alpine or polar regions surrounding the shadow of the head of an observer cast upon a bank of cloud or mist. The halo diminishes in brightness from the centre outwards, and is probably due to the diffraction of light. Under favourable conditions four concentric rings may be seen round the shadow of the observer's head, the outermost, which seldom appears, having an angular radius of 40°.

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Anthelion'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​a/anthelion.html. 1910.
 
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