With over a week of docked operations behind them, the astronauts and cosmonauts said their goodbyes and closed the hatches between the International Space Station and space shuttle Discovery at 11:41 p.m. EDT Monday.

Discovery is scheduled to undock from the station at 3:26 p.m. Tuesday to begin the trip back to Earth.

The 13 crew members aboard space shuttle Discovery and the International Space Station completed final transfer work between the two spacecraft and returned the high-tech moving van "Leonardo" back to the orbiter's payload bay Monday.

Arriving aboard Discovery was the newest Expedition 20 crew member, Nicole Stott, who switched places with Mission Specialist Tim Kopra. Stott will handle flight engineer duties aboard the station until her return home aboard Atlantis following the STS-129 mission in November.

Discovery delivered more than seven tons of supplies, science racks and equipment, as well as additional environmental hardware to sustain six crew members on the orbital outpost.

For the latest news and information on the STS-128 mission, visit the main shuttle page. http://www.nasa.gov/mission_pages/shuttle/main/index.html