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On Tuesday, September 15, 2015. Sebastian Stan and Mackenzie Davis, stars of The Martian, shared the stage with Johnson Space Center (JSC) center director and former space shuttle astronaut Ellen Ochoa, along with astronaut Mike "Hopper" Hopkins, and Attitude Determination and Control Officer (ADCO) Pooja Jesrani for a question and answer session about 20th Century Fox's "The Martian." Specifically, they discussed how space flight works in the real world. The group went on to tour JSC, and were able to talk to astronauts Scott Kelly and Kjell Lindgren, who have served on the International Space Station. The day ended with a screening of The Martian. Photos courtesy: Juan Diego Delagarza