Spacewalk: meaning, definitions and examples

Historical Origins

• The first spacewalk occurred on March 18, 1965, when Soviet cosmonaut Alexei Leonov exited his spacecraft for 12 minutes.
• The term 'extravehicular activity' (EVA) is used to describe activities done outside a spacecraft, including spacewalks.
• NASA's first American spacewalk took place in 1965, just a short time after Alexei Leonov's historic venture.

Science

• Spacewalks allow scientists to conduct experiments in a microgravity environment, which is impossible on Earth.
• While outside, astronauts experience extreme temperatures, ranging from -250°F to 250°F, depending on sunlight exposure.
• Astronauts wear specialized suits called Extravehicular Mobility Units (EMUs) to protect them from harsh space conditions.

Human Experience

• Spacewalks challenge the physical and mental limits of astronauts, requiring them to manage stress and perform tasks in zero gravity.
• The vastness of space, experienced during a spacewalk, has been described as both awe-inspiring and humbling by astronauts.
• Many astronauts report feelings of serenity and insignificance when viewing Earth from space during their walks.

Pop Culture

• Spacewalks have been featured in many sci-fi movies and TV shows, highlighting both their wonder and danger.
• Popular representations include films like 'Gravity' and 'Interstellar', which dramatize the experience of being in space.
• Video games like 'Kerbal Space Program' allow players to simulate spacewalks, increasing interest in space exploration.

Technological Advancements

• The technology behind spacewalk suits has advanced significantly, enhancing safety and functionality for astronauts.
• Robotic arms and tools used during spacewalks have become more sophisticated, allowing for precision work on satellites and space stations.
• Recent advancements include tools that are controlled remotely, enabling astronauts to perform tasks from within their spacecraft.