The International Space Station (ISS) is a habitable artificial satellite, in low Earth orbit. Its first component was launched into orbit in 1998, and the ISS is now the largest artificial body in orbit and can often be seen with the naked eye from Earth.
The ISS consists of pressurised modules, external trusses, solar arrays, and other components. The components have been launched by Russian Proton and Soyuz rockets, and American Space Shuttles.
Team of astronauts are sent to the ISS for various scientific missions. Their length of stay usually varies from few weeks to months.