About - Submit Optics Picture of the Day Galleries Previous Next Today  
Moondogs & Light Pillars, Eastern Siberia ~ Images by Okcana Gracheva at Aykhal, a diamond mining centre in Yakutia.   Millions of low level horizontal plate crystals drifting in the freezing air reflect ground lights to produce the illusion of upward pillars of light.   Similar plates, probably in high cirrus, generate the moondogs, a faint 22° halo and a hint of parhelic circle.    All images ©Okcana Gracheva, shown with permission