NASA is facing a crisis, as it tries to figure out when and how to bring back astronauts -- Sunita Williams and Barry Wilmore -- who are stranded at the International Space Station. Their trip back might be some time next year, instead of the planned 8 days. Hairianto Diman find out what challenges they’re facing whilst on the ISS for the next few months with Dr Brad Tucker, Astrophysics and Cosmologist, ANU Research School of Astronomy and Astrophysics

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