Evangelin Petry

Evangelin Petry

Modified & Updated: 08 Sep 2023

Source: Universetoday.com

Spacewalks, also known as extravehicular activities (EVAs), are one of the most awe-inspiring and daring feats in the realm of space exploration. Astronauts don their spacesuits, step outside their spacecraft, and venture into the vast emptiness of space. These brave individuals conduct various tasks and experiments, pushing the boundaries of human endurance and technological capabilities. From repairing satellites to assembling space stations, spacewalks have played a pivotal role in advancing our understanding of the cosmos. In this article, we will delve into 14 astounding facts about spacewalks that will leave you marveling at the sheer audacity and remarkable accomplishments of these cosmic explorers.

Table of Contents

Spacewalks, also known as Extravehicular Activity (EVA), are performed by astronauts outside of their spacecraft.

During a spacewalk, astronauts leave the confines of their spacecraft to perform various tasks and experiments in the vacuum of space.

The first-ever spacewalk took place on March 18, 1965, during the Voskhod 2 mission by Russian cosmonaut Alexei Leonov.

Leonov spent a total of 12 minutes and 9 seconds outside the spacecraft, floating freely in space.

The longest spacewalk in history was conducted by Russian cosmonauts Fyodor Yurchikhin and Alexander Misurkin on August 16, 2013.

They spent a staggering 8 hours and 7 minutes outside the International Space Station (ISS) to install equipment and perform maintenance tasks.

Spacewalks are physically demanding activities that require careful planning, intense training, and specialized equipment to ensure the safety of astronauts.

Astronauts must undergo rigorous physical and mental preparations to adapt to the harsh conditions of space and handle any emergencies that may arise.

Spacewalks are not performed solely for scientific experiments; they also involve routine maintenance tasks such as repairing equipment, replacing parts, and testing new technologies.

Astronauts play a crucial role in ensuring the smooth operation of spacecraft and space stations through their extravehicular activities.

Spacewalks are conducted in spacesuits specifically designed for the demands of extravehicular activities.

These suits, known as Extravehicular Mobility Units (EMUs), provide pressure, oxygen, temperature control, and radiation protection for astronauts during their time outside the spacecraft.

The EMUs used by astronauts during spacewalks are custom-fitted to each individual and are equipped with a jet-powered backpack called a “Simplified Aid for EVA Rescue” (SAFER) for emergency propulsion.

This allows astronauts to maneuver in the event of an untethered spacewalk.

Astronauts experience a unique sensation during spacewalks known as the “Overview Effect.”

Seeing the Earth from space and being surrounded by the vastness of the universe offers a profound perspective on our planet and its place in the cosmos. It has been described as a life-changing experience by many astronauts.

Spacewalks are not without risks. Astronauts are exposed to extreme temperatures, micrometeoroids, solar radiation, and the potential danger of equipment malfunctions.

Therefore, meticulous planning and preparation are essential to ensure the safety and success of each mission.

In addition to repairing and maintaining spacecraft, spacewalks have also been crucial for the construction of the International Space Station (ISS).

Astronauts have conducted numerous spacewalks to assemble modules, connect cables, and perform necessary upgrades on the ISS.

The first American woman to perform a spacewalk was astronaut Kathryn D. Sullivan on October 11, 1984, during the STS-41-G mission.

She spent a total of 3 hours and 29 minutes outside the space shuttle Challenger.

Spacewalks require a high level of coordination between astronauts and ground control teams.

Communications are crucial to ensure that astronauts receive real-time instructions and assistance during their extravehicular activities.

Spacewalks have played a vital role in the exploration of other celestial bodies.

During the Apollo missions, astronauts performed lunar extravehicular activities, allowing them to collect samples, deploy scientific instruments, and gather important data about the Moon.

Spacewalks continue to be an integral part of space exploration and will be instrumental in future missions, such as the Artemis program, which aims to return humans to the Moon and eventually send astronauts to Mars.

These extravehicular activities provide valuable opportunities for scientific research, technological advancements, and expanding our understanding of the universe.

So, there you have it — 14 astounding facts about spacewalks (extravehicular activity). From the first human stepping into the vastness of space to the ongoing efforts to explore new frontiers, spacewalks have been pivotal in pushing the boundaries of human exploration. Whether it’s performing crucial maintenance tasks, assembling space stations, or gaining new perspectives on our planet, spacewalks have undeniably shaped our understanding of the universe. As we look ahead to future missions, these daring excursions into the unknown will undoubtedly continue to captivate and inspire us all.


In conclusion, spacewalks, also known as extravehicular activities (EVAs), are truly awe-inspiring feats of human exploration. They allow astronauts to venture outside their spacecraft and work in the harsh environment of space. From historical milestones to technical challenges, spacewalks have provided us with valuable insights and groundbreaking discoveries. They have not only expanded our understanding of the universe but have also paved the way for future space exploration missions.Throughout the years, space agencies have continuously improved their spacewalk procedures and technology, ensuring the safety and success of these missions. As we continue to push the boundaries of human space exploration, the significance of spacewalks cannot be underestimated. They are a testament to human ingenuity, determination, and the relentless pursuit of knowledge beyond our planet.So, the next time you look up at the night sky, remember the remarkable achievements that astronauts have made during their spacewalks, and marvel at the wonders of the universe that await our exploration.


1. What is an extravehicular activity (EVA)?

An extravehicular activity, or EVA, is a spacewalk where an astronaut leaves the confines of their spacecraft and works outside in the vacuum of space.

2. How long do spacewalks typically last?

Spacewalks can vary in duration. They can last anywhere from a few hours to several hours, depending on the mission objectives and tasks at hand.

3. How do astronauts prepare for spacewalks?

Astronauts undergo extensive training prior to a spacewalk. They practice underwater in specially designed neutral buoyancy tanks, which simulate the weightlessness of space. They also undergo physical conditioning and learn how to use the specific equipment required for a spacewalk.

4. Can astronauts float away during a spacewalk?

Astronauts are securely tethered to their spacecraft during a spacewalk. The tethers prevent them from floating away and keep them connected to their shuttle or space station.

5. How do astronauts move around in space during a spacewalk?

Astronauts use a special type of propulsion called a Hand-Held Maneuvering Unit (HHMU) to move around in space during a spacewalk. It provides them with the necessary thrust to navigate and perform tasks.

6. Have there been any accidents during spacewalks?

While spacewalks have some inherent risks, accidents during spacewalks are extremely rare. Space agencies have implemented strict safety protocols and procedures to minimize risks and ensure astronaut safety.

7. What are the objectives of a spacewalk?

The objectives of a spacewalk can vary depending on the mission. It can include tasks such as conducting experiments, repairs and maintenance on spacecraft, deploying or retrieving satellites, and testing new equipment.