The International Space Station Wraps Up a Busy 2021

The ISS, now in its twenty-first year of continuous human occupation, has had a busy year of operations. Two new modules were added and 18 visiting vehicles were at the Station throughout the year. In total, 23 humans called the orbiting outpost home in 2021. This year marked the completion of the Russian Orbital Segment – shortened to ROS – with the arrival of Nauka and Prichal, the first of which replaced the Pirs module. More

(Source: NASASpaceFlight.com - Jan 2)