The diamond-ring effect occurred at the beginning and end of totality during a total solar eclipse.
AFRC2017-0233-009
The diamond-ring effect occurred at the beginning and end of totality during a total solar eclipse. As the last bits of sunlight pass through the valleys on the moon’s limb, and the faint corona around the Sun is just becoming visible, it looks like a ring with glittering diamonds on it.
August 21, 2017NASA Photo / Carla Thomas