Who's been to the ISS?

A look at the select few who have visited the International Space Station.

An illustration of the International Space Station
Royal Institution

Over 200 people have visited the International Space Station. But who are they? What does it take to join the elite crew of people who have looked down on the earth from this tiny outpost circling above the clouds?

Click the image below to view the full size graphic, or download a printable poster version here.