Lights off for #EarthHour tonight at 20:30 local time https://t.co/myGlZZZ9MB
— ESA (@esa) March 25, 2017
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Michigan Astronomy Observing
Lights off for #EarthHour tonight at 20:30 local time https://t.co/myGlZZZ9MB
— ESA (@esa) March 25, 2017