Posted on

Sunset Pillar Skyshow Triptych

Sunset Pillar Skyshow Triptych
Sunset Pillar Skyshow Triptych

Sunset Pillar Skyshow Triptych (3 – 20×20 inch images. )

Sun pillars are shafts of light. Ice reflected spotlights as it were shooting generally 90 degrees up or down to the horizon.

I’ve seen them below the sun many times as well. They form on ice crystals in the atmosphere. A combination of many many reflections off the large flat face of horizontally falling plate ice crystals. The effect is very similar to any slightly tilted horizontal surface. For instance, water reflect a light source (usually the sun) and spread it out vertically. This one is pretty big. This is close to a 24mm image which is about 1/2 again the angle than your normal vision at 55mm.

The Physics explains it of course but the bigger they are, the rarer they are. The maximum extent of the pillar is about twice the maximum tilt of the plate crystals. For this Phenomena to occur, big oriented plates of ice at a high angle are required. The crystals are all flat 6 sided plates. These fall the same way due to atmospheric resistance and their shape. Calm falling air is necessary. The high tilt is unusual. I’ve read that 5-10 degrees tall is not unusual. I bet this is 40 degrees tall if not 45 degrees. This is a very big image wide and high. (I’d have to look at the meta data and do the math. It certainly seemed big to me at the time (click click click etc ).

Location: Bliss DInosaur Ranch, Wyoming/Montana borderlands. (Wyotana)

Title: Sunset Pillar Skyshow Triptych