Astronaut students training in free-fall. Astronaut candidates from both NASA and the Japanese space agency (JAXA) experiencing free-fall in a training aircraft. This parabolic trajectory,flown in a KC-135 aircraft over the Gulf of Mexico,produces a few seconds of free-fall,replicating spaceflight conditions in Earth orbit. In a typical flight,40 to 60 parabolas are flown (65 seconds each),with 25 seconds of free-fall each time. The US candidates here include Randolph James Bresnik (born 1967,left) and Shannon Walker (born 1965,right). Both have since flown missions in space. Photographed on 13 October 2004 | |
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Credit: | Science Photo Library / NASA |
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