Habitable artificial satellite in low Earth orbit
The International Space Station (ISS) is a collaborative project by five space agencies. It is the largest space station ever built, conducting microgravity experiments. Divided into Russian and US segments, it features the Integrated Truss Structure and pressurized modules for various functions. The ISS orbits Earth at 400 km altitude, completing 15.5 orbits daily. It originated from plans by the US and Soviet Union, with the first module launched in 1998. Continuously occupied for over 23 years, the ISS has hosted 279 individuals from 22 countries and is planned to be de-orbited in January 2031.