Rainbow.
Supernumerary rainbows.
Example of 22 degree halo with sundogs (parhelia).
Example of 22 & 46 degree halo with sundogs (parhelia) & tangent arcs.
Saturday dinner sundog.
4 May 2011 halo (credit: Pete Treperinas).
4 May 2011 halo (credit: Mixtli Zavaleta).
Lunar corona from North Seattle.