The STS-122 shuttle mission will deliver the European Space Agency's Columbus Laboratory to the International Space Station. Expedition Sixteen Flight Engineer Daniel Tani, brought to the space station on the STS-120 mission, will return home with the STS-122 crew. STS-122 will deliver European Space Agency Astronaut Léopold Eyharts to the complex to replace him.
Several Detailed Supplementary Objectives (DSOs) and Supplemental Medical Objectives (SMOs) will also be flown during the STS-122 mission. DSOs and SMOs are space and life sciences investigations. Their purpose is to determine the extent of physiological deconditioning resulting from space flight, test countermeasures to those changes, and characterize the environment of the Space Shuttle and/or space station relative to crew health. Experiments being performed during this mission are:
Space Shuttle Atlantis STS-122 is scheduled to last 11 days. This flight will be the orbiter's 29th mission and the 121st in the Shuttle program's history.