The International Space Station (ISS) is a large laboratory in space. It orbits Earth and travels very fast — about 28,000 kilometers per hour.
Astronauts from different countries live and work there. Agencies like Roscosmos and European Space Agency work together on this project.
On the ISS, astronauts do experiments in science and medicine. They also study how living in space affects the human body.
The ISS shows that countries can work together to explore space peacefully.