The 520 days of isolation for the Mars500 crew will end on November 4, when the hatch of their 'spacecraft' is opened for the first time since June last year. Photo / supplied
After spending a year-and-a-half locked away in steel tubes, six astronauts are about to return to the real world.
The Mars500 project - undertaken at a Moscow institute - was intended to find out how the human mind and body would cope on a long-duration spaceflight.
The study included a
pretend landing on Mars, where three of the crew donned real spacesuits and walked across an enclosed sandy yard.
The crew, comprised of three Russians, two Europeans and a Chinese national, have had only limited contact with the outside world since they were locked away on June 3 last year.
Their "spaceship" has no windows, and the protocols demanded their communications endure a similar time lag to that encountered by real messages as they travel the vast distance between Earth and Mars. The round travel time for a question to be sent and for an answer to be received was about 25 minutes.