Australian Weather Calendar: Cover 2018

Cover 2018 Photographer Luke Tscharke

Luke Tscharke was in one of his favourite places, Kosciuszko National Park, for a full moon in May 2016. As the moon shone through cirrostratus clouds, the refracted light formed a halo. Cirrostratus, high in the atmosphere, are made of ice crystals. As light passes through these crystals its path is refracted, or bent, by 22–50o. No light is refracted at less than 22o, so an observer sees a halo around the sun or moon. The bright dot to the right of the moon in Luke's photo is the planet Mars.

White arrow from the left pointing right from the moon showing how light works