400_Days.

[Himmel]

The psychological sci-fi centers on four astronauts who are sent on a simulated mission to a distant planet to test the psychological effects of deep space travel. Locked away for 400 days, the crews mental state begins to deteriorate when they lose all communication with the outside world. Forced to exit the ship, they discover that this mission may have not been a simulation after all.

The film stars:
Brandon Routh, Caty Lotz, Ben Feldman, Tom Cavanaugh, Grant Bowler, Fernanda Romero, Sally Pressman, Dominic Bogart, Frank Ashmore, and Dane Cook.

http://bloody-disgusting.com/images/...00-days-space/