Science & Tech

What Is Mir? Learn About the Mir Space Station’s Origins and 9 Key Milestones From Its History

Written by the MasterClass staff

Last updated: Sep 29, 2021 • 5 min read

The International Space Station (ISS) is a symbol of humanity’s prowess and potential for space travel. But in the 1980s and 1990s, Mir, a major space station built by the Soviet Union, played that role. Mir outlasted the USSR, eventually orbiting Earth for 15 years and hosting crew members from across Europe, the United States, and Canada.