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Space station will fall to Earth, but nobody knows when
The Chinese space station Tiangong-1, which fell to Earth at the climax of the film 'Gravity', will soon do so for real. But nobody knows when. Harvard astrophysicist Jonathan McDowell contemplates the likelihood of debris falling on someone and the growth of China's space programme.
(Photo: The Shenzhou-9 spacecraft approaching the Tiangong-1 module for docking in July 2012)
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