出典:Wikipedia
出典:『Wikipedia』 (2011/06/16 04:24 UTC 版)
The diamond ring effect is a feature of total solar eclipses. Just before the sun disappears or just after it emerges from behind the moon, the rugged lunar limb topography allows beads of sunlight to shine through. This effect is called Baily's beads, in honor of Francis Baily who first noted the phenomenon in 1836.