Science & Tech

What Is a Spacewalk? Learn Why Astronauts Perform Spacewalks and How Astronauts Train for Spacewalks

Written by the MasterClass staff

Last updated: Sep 29, 2021 • 5 min read

An astronaut spacewalk is a dangerous extra vehicular activity which requires astronauts to exit the relative safety of their spacecraft (space station or space shuttle) to perform work on its exterior. The process adheres to strict safety procedures, requires extensive safety equipment, and is only performed when a space agency determines it is absolutely necessary.