The Soyuz TMA-14 spacecraft, returning from the International Space Station, has landed successfully in Kazakhstan.

The spacecraft brought Expedition-20 crew Michael Barratt, Gennady Padalka and spaceflight participant Guy Laliberte back to Earth.

The Soyuz TMA-14 had launched in March 2009 on mission 19 to the station.

The Expedition 19 included work on experiments including human life sciences, physical sciences and earth observation, and conducting technology demonstrations.

The experiments are designed to gather information about the effects of long-duration spaceflight on the human body to help with planning future exploration missions to the moon and Mars.

During the mission, the astronauts presided over the inauguration of a six-person crew and two space shuttle assembly and resupply missions to the station.

They were also present during the delivery of cargo and new science facilities for expanded research, and the arrival of the first Japanese H-II transfer cargo vehicle.

With the return of the Soyuz craft, the station is occupied by Expedition 21 crew members.