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A girl in a school in Beijing asks Chinese female astrounaut Wang Yaping (Top R) questions as Wang delivers a lesson to students from Tiangong-1 space module in the morning of June 20, 2013. A Chinese astronaut orbiting more than 300 kilometres (186 miles) above the Earth's surface delivered a video class to children across the country on June 20, state television showed in a live broadcast. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP via Getty Images)

A girl in a school in Beijing asks Chinese female astrounaut Wang Yaping (Top R) questions as Wang delivers a lesson to students from Tiangong-1 space module in the morning of June 20, 2013. A Chinese astronaut orbiting more than 300 kilometres (186 miles) above the Earth's surface delivered a video class to children across the country on June 20, state television showed in a live broadcast.    CHINA OUT     AFP PHOTO        (Photo credit should read STR/AFP via Getty Images)