City Map in the Sky

(Slate::Bad Astronomy) – Phil Plait:

What you are seeing are light pillars caused by lights in the city of Eura, Finland. Street lights, buildings, what have you; each cast their luminance upwards, where they hit widespread hexagonal ice crystals in the air, and the light was reflected back toward the photographer. …

bad_astronomy/2016/01/16/optical

Eura City map in the sky

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