Fig. 10 Map of light pollution’s visual impact on the night sky.

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Presentation transcript:

Fig. 10 Map of light pollution’s visual impact on the night sky. Map of light pollution’s visual impact on the night sky. The sky brightness levels are those used in the tables and indicate the following: up to 1% above the natural light (0 to 1.7 μcd/m2; black); from 1 to 8% above the natural light (1.7 to 14 μcd/m2; blue); from 8 to 50% above natural nighttime brightness (14 to 87 μcd/m2; green); from 50% above natural to the level of light under which the Milky Way is no longer visible (87 to 688 μcd/m2; yellow); from Milky Way loss to estimated cone stimulation (688 to 3000 μcd/m2; red); and very high nighttime light intensities, with no dark adaption for human eyes (>3000 μcd/m2; white). Fabio Falchi et al. Sci Adv 2016;2:e1600377 Copyright © 2016, The Authors