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This photo was taken by Greg Olsen on his trip to the ISS in October 2005. The tech entrepreneur paid $20 million for the trip. Olsen made his fortune by selling his first company, Epitaxx, for $12 million. He then founded Sensors Unlimited in 1992, sold it for $700 million in 2000, repurchased it for $6 million in 2002 and sold it again for $60 million.