The International Space Station is celebrating 20 years since being launched into orbit.
On November 20 1998, Zarya was the first piece of the ISS, carried into space by a Russian Proton rocket.
The station was unmanned until nearly two years later, when American astronaut Shepherd along with Russian cosmonauts Sergei Krikalev and Yuri Gidzenko arrived on board on October 30 2000.
The ISS has been inhabited every day since, and crew members carry out research they would not be able to do on Earth.
Celebrating 20 years since the launch of the 1st module Zarya…Happy Birthday #ISS! An incredible feat of engineering, a marvel of international cooperation and nearly 3000 scientific investigations completed – thank you to all who continue to make it happen. #ISS20 pic.twitter.com/eyDMvrJDVf
— Tim Peake (@astro_timpeake) November 20, 2018
However, it was not complete until 2011, when the final module was installed, and looks set to be decommissioned by 2028.
In its 20-year history, 230 individuals have been on board the station, originating from 18 different countries.