Happy Birthday, ISS!

Nations around the world will join together to mark a milestone in space exploration this week, celebrating the 10th birthday of a unique research laboratory, the International Space Station.

Now the largest spacecraft ever built, the orbital assembly of the space station began with the launch from Kazakhstan of the bus-sized Zarya module on November 20, 1998. The launch began an international construction project of unprecedented complexity and sophistication.

The station is a venture of international cooperation among NASA, the Russian Federal Space Agency, Canadian Space Agency, Japan Aerospace Exploration Agency, or JAXA, and 11 members of the European Space Agency, or ESA: Belgium, Denmark, France, Germany, Italy, the Netherlands, Norway, Spain, Sweden, Switzerland and the United Kingdom.

More than 100,000 people in space agencies and contractor facilities in 37 US states and throughout the world are involved in this endeavor.

"The station's capability and sheer size today are truly amazing," said International Space Station Program Manager Mike Suffredini. "The tremendous technological achievement in orbit is matched only by the cooperation and perseverance of its partners on the ground. We have overcome differences in language, geography and engineering philosophies to succeed."

Only a few weeks after the US-funded, Russian-built Zarya module was launched from Kazakhstan, the space shuttle carried aloft the Unity connector module in December 1998. Constructed on opposite sides of Earth, Unity and Zarya met for the first time in space and were joined to begin the orbital station's assembly and a decade of peaceful cooperation.

Ten years later, the station's mass has expanded to more than 627,000 pounds, and its interior volume is more than 25,000 cubic feet, comparable to the size of a five-bedroom house. Since Zarya's launch as the early command, control and power module, there have been 29 additional construction flights to the station: 27 aboard the space shuttle and two additional Russian launches.

One hundred sixty seven individuals representing 14 countries have visited the complex. The International Space Station hosts 19 research facilities, including nine sponsored by NASA, eight by ESA and two by JAXA. Cooperation among international teams of humans and robots is expected to become a mainstay of space exploration throughout our solar system.

"With the International Space Station, we have learned so many things -- and we're going to take that knowledge and apply it to flying to the moon and Mars," said Expedition 18 Commander Mike Fincke, now aboard the station. "Everything we're learning so close to home, only 240 miles away from the planet, we can apply to the moon 240,000 miles away."

FMI: www.nasa.gov/station, www.spaceflight.nasa.gov/realdata/sightings