An anonymous reader quotes a report from Phys.Org: The International Space Station, the space laboratory that showcases cooperation between Russia and the United States, on Monday orbited Earth for the 100,000th time, Russian mission control said. Traveling at an altitude of about 250 miles (400 kilometers) and a speed of about 17,500 miles (28,000 kilometers) per hour, the space station circles the Earth once every 90 minutes. The ISS has now traveled 2.6 billion miles "or about the distance of 10 round trips to Mars," NASA said on the station's official Twitter feed. From two modules, it has grown to 15 modules, occupying a space the size of a football pitch and represents around $100 billion in investment. "Such a long lifespan of the ISS proves that mankind has the necessary technologies for constant presence in orbit, that we have the potential for further space exploration," said Matyushin.