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While Baily's beads are seen briefly for a few seconds at the center of the eclipse path, their duration is maximized near the edges of the path of the umbra, lasting around 90 seconds. It is not safe to view Baily's beads or the diamond ring effect without proper eye protection because in both cases the photosphere is still visible.
Those are known as Baily’s beads, named after English astronomer Francis Baily, who first observed the phenomenon during a total eclipse of the sun May 15, 1836. His vivid descriptions of the ...
Eerie skies, a glistening “diamond ring effect,” Baily’s beads and a halo around the sun are some of the phases to watch for during the April 8 total solar eclipse.
Francis Baily observed the total solar eclipse from Italy, focusing his attention on the solar corona and prominences and identified them as part of the Sun's atmosphere. The solar eclipse effect now called Baily's beads named in honor of him after his correct explanation of the phenomenon in 1836. Francis Baily.
The phenomenon, which depends upon the irregular shape of the Moon's limb, was so vividly described by him as to attract an unprecedented amount of attention to the total eclipse of 8 July 1842, observed by Baily himself at Pavia. Baily's beads four seconds before totality (August 21, 2017)
In the subsequent Baily’s Beads phase, points of light from the sun shine around the moon’s edges because of the irregular lunar topography, producing small beads of light.