Do your kids ever ask why we have day and night on planet #Earth ? @Paxi_ESAKids explains https://t.co/v4OCwtUofw
— ESA (@esa) January 17, 2017
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Do your kids ever ask why we have day and night on planet #Earth ? @Paxi_ESAKids explains https://t.co/v4OCwtUofw
— ESA (@esa) January 17, 2017