Fig. 2 | Scientific Reports

Fig. 2

From: Natural experiments from Earth Hour reveal urban night sky being drastically lit up by few decorative buildings

Fig. 2

All-sky images of the lights-out in 2015–2019 are arranged from top to bottom. Images were taken at 20:00 (before the lights-out, left column), 21:00 (during the lights-out, middle column) and 22:00 (after the lights-out, right column). Timestamps in YYYY MM DD HHMM are repeated above the images. The Moon, if presented and was not blocked by clouds, appeared as a bright spot in the images. North is oriented at the top while east is at the left of the images. The all-sky images are courtesy of the Hong Kong Space Museum.

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