Robert Wagner - Atmospheric Optics

Parhelion

Accompanying ZZA:

Fogbow

Zircumzenithal arc

22 degree Moon halo

Moon corona

Knowing the radius of the corona (from the radius of the moon photographed with the same lens on a moonless night; see inset), one can estimate the diameter of the water droplets that caused the corona to be around 20 μm.

22 degree halo and circumscribed halo around the moon

Colorful sunsets, November 2006

Iridescent clouds, 2006 November 8

Iridescent clouds, 2006 December 3