Afterglow
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In meteorology, an afterglow is an optical phenomenon, generally referring to a broad arch of whitish or pinkish sunlight in the twilight sky after sunset, consisting of purple light and bright segmen
Afterglow with its bright segment and purple light above, interrupted by crepuscular rays
Purple light with crepuscular shadow
Sunset in Hong Kong after the 1991 eruption of Mount Pinatubo
An afterglow in Dresden, Saxony, Germany
Optical phenomenon
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Optical phenomena are any observable events that result from the interaction of light and matter.
Afterglow
…In meteorology, an afterglow is an optical phenomenon, generally referring to a broad arch of whitish or pinkish sunlight in the twilight sky after sunset, consisting of purple light and bright segment…
A 22° halo around the Moon in Atherton, California
A solar halo as seen from 41° south latitude
A circumzenithal arc over Grand Forks, North Dakota
The Belt of Venus over Paranal Observatory atop Cerro Paranal in the Atacama Desert, northern Chile