Love (2011)

After losing contact with Earth, Astronaut Lee Miller becomes stranded in orbit alone aboard the abandoned International Space Station. As the life-support systems dwindle, Lee battles to maintain his sanity as he alternates between performing repairs and reading the 1864 journal of American Civil War soldier Captain Briggs. He faces a slow, claustrophobic and lonely death until he discovers the mysterious object found by Briggs aboard the ship.