Photo Gallery: 'Gravity' and Real Space Travel 10/23/2013
 Sandra Bullock as astronaut Ryan Stone in "Gravity." The film tells the story...
Warner Bros.

Sandra Bullock as astronaut Ryan Stone in "Gravity." The film tells the story of a pair of astronauts left drifting in space after debris cripples their shuttle. Ulrich Walter, who spent 10 days orbiting the Earth on board the space shuttle Columbia in 1993, lauds the film's depiction of a zero-gravity environment.