Russia has revealed plans for its own new space station to replace the ISS when it comes to an end.
Called the Russian Orbital Station, or ROS, it will will include three modules, with an option to add two more at a later date. It is believed the station could become integral to Russia's plans to return to the moon and build a lunar base by 2030.
The Russian Nauka module, which is set to be launched to the ISS next year would form the basis of the new station.
https://en.wikipedia.org/wiki/Nauka_(ISS_module)
According to Russian space expert Anatoly Zak,
writing at Popular Mechanics, the detailed plans for the Russian station have been revealed for the first time.
Previously the Russians had mulled a station called Orbital Piloted Assembly and Experiment Complex (OPSEK).
The new station would be formed by disconnecting a yet to launch Russian module called Nauka, currently scheduled to launch in December 2017.
'According to RKK Energia, the prime Russian contractor on the ISS, the new outpost would begin with the separation of the Nauka from the rest of the old station in mid-2020s.