1. Five ISS modules were built by Russia, seven by the USA. One module was built by Japan and the European Union.
2. The weight of the International Space Station is over 417 tons.
3. The internal volume of the ISS is about a thousand cubic meters of space.
4. The skin of the ISS partially protects astronauts from solar radiation, but only partially (see facts about space).
5. The ISS orbits at an altitude of 415-420 kilometers. This value is not constant, because due to friction against the upper layers of the atmosphere, the station gradually loses altitude, and it has to be corrected.
