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The International Space Station (ISS) is a large spacecraft that orbits Earth and is home to astronauts from around the world. It is a collaboration between space agencies from the United States, Russia, Canada, Japan, and several European countries. The ISS serves as a research laboratory, allowing scientists to perform experiments in microgravity that cannot be done on Earth. It also serves as a testing ground for technologies that will be used in future space exploration missions.

The ISS is approximately the size of a football field and can support a crew of up to six astronauts. The astronauts live and work on the station for months at a time, conducting scientific research, performing maintenance, and making repairs. They also conduct spacewalks to perform tasks outside the station.

The ISS is constantly orbiting Earth at an altitude of approximately 250 miles (400 kilometers). It completes about 15.5 orbits around Earth every day and travels at a speed of about 17,500 miles per hour (28,000 kilometers per hour). Despite its high speed, the astronauts on board experience weightlessness due to the lack of gravity in space.

The ISS is a symbol of international cooperation in space exploration and has been continuously occupied by astronauts since 2000. It is a platform for scientific research that spans multiple disciplines, including biology, physics, astronomy, and meteorology. The research conducted on the ISS is helping us to understand how living organisms function in space and how humans can survive and thrive in space for long periods of time.