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Assembling a World-Class Orbiting Laboratory
Phases Two and Three

Phase One of the International Space Station Program 
Phases Two and Three 
Launches of Early Station Components and the First Crew  
Science Activities and Future Exploration  
Fun Facts 

With Phase I completed, the next two phases of the International Space Station are becoming a reality.

Phase II, construction in orbit, begins with the first station elements to be launched in 1998-Zarya in November and Unity in December. Next, the first wholly Russian contribution, a component called the Service Module, will be launched from Russia in 1999. It will provide the initial living quarters and life support systems.

After additional assembly and supply flights, a three-person crew will be launched aboard a Russian Soyuz capsule in January 2000. From that point on, the station will be permanently inhabited. Phase II of the station's assembly will be completed, at which point the station will be ready for scientific research work to begin in a U.S. laboratory module.

Phase III of assembly will see the International Space Station progress gradually to completion, equipped with laboratory modules supplied by the United States, Japan, Europe and Russia and with a robot arm supplied by Canada. A crew of up to seven members will be able to live and work aboard the station.

Curator: Kim Dismukes | Responsible NASA Official: Kelly Humphries | Updated 11/9/98
What you should know about the NASA Web Policy

Curator: Kim Dismukes | Responsible NASA Official: John Ira Petty | Updated: 04/07/2002
Web Accessibility and Policy Notices