The astronaut who spent more than 311 days in space was Sergei Krikalev. He did not get lost, but rather he was on an extended mission aboard the Mir space station.
Sergei Krikalev's mission extended due to unforeseen circumstances. Here's a breakdown:
| Event | Date |
|---|---|
| Krikalev returned to Mir as part of the Mir EO-9 crew | May 18, 1991 |
| Krikalev's return to Earth | March 25, 1992 |
Krikalev remained aboard the Mir space station during this time, working as part of the crew. He was not lost in space, and his extended time on Mir was a result of planned mission changes and delays in the launch schedule.
His extended mission is notable for several reasons:
- He was part of the Mir EO-9 crew alongside Anatoli Artsebarski, and Helen Sharman.
- The breakup of the Soviet Union created a situation where his return was delayed.
- He was onboard Mir for more than 311 days, returning to Earth on March 25, 1992.
