diamond ring effect

American

noun

Astronomy.

a phenomenon, sometimes observed immediately before and after a total eclipse of the sun, in which one of Baily's beads is much brighter than the others, resembling a diamond ring around the moon.

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diamond ring effect

As the deepest lunar valley passes across the face of the sun, the last ray of light flares out through it, creating what is called the diamond ring effect.

From Salon ● Aug. 19, 2017

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