Chapter 21 of 29 from Chris Hadfield

Spacewalking: Training


Chris describes his personal experience training for spacewalking in an underwater simulation and emphasizes the importance of gaining confidence in maneuvering and monitoring the spacesuit.

Topics include: Spacewalk Simulations • Mentally Get Yourself in the Game

Chris describes his personal experience training for spacewalking in an underwater simulation and emphasizes the importance of gaining confidence in maneuvering and monitoring the spacesuit.

Topics include: Spacewalk Simulations • Mentally Get Yourself in the Game

Chris Hadfield

Chris Hadfield Teaches Space Exploration

In 28+ lessons, the former commander of the International Space Station teaches you the science of space exploration and what the future holds.

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Explore the unknown

Impossible things happen. At age nine, Chris Hadfield knew he wanted to go to space. He eventually went there three times, becoming a commander of the International Space Station. In his MasterClass, Chris teaches you what it takes to explore space and what the future holds for humans in the final frontier. Learn about the science of space travel, life as an astronaut, and how flying in space will forever change the way you think about living on Earth.

Learn about the past, present, and future of space exploration with astronaut Chris Hadfield.

Download the workbook for lesson recaps, assignments, and photocopies of handwritten notes that Chris took to space.

Upload videos to get feedback from the class. Chris will also answer select student questions.


Students give MasterClass an average rating of 4.7 out of 5 stars.

Chris Hadfield is pure inspiration. His wise words have helped give structure and substance to everything I want to do. This is a class I will definitely revisit. Thank you!

Expert teacher sharing his story with passion. Think it´s so good way to learn to listen to someone who is world class about the subject :) :)

I decided to take the masterclass to further my studies in the areas that interest me. I found the masterclass course informative, interesting & inspiring.

Excellent Masterclass Chris Hadfield is wonderful at explaining the journey past and present and into the future which made me see it all clearer.


Pedro C.

This theme is so challenging and inspiring. It left me wanting to get into a Spacesuit and assume the challenges!!! It would have been so nice to get access to videos of complete sessions of training, just to get the "experience". Also, it would be great to watch real incidents and accidents during spacewalking, discussed from a training perspective.

Myroslav R.

Could someone explain me - the inertia works differently on orbit and under water, how does the astronauts train work in such condition?


Fascinating! The mental game behind all of this is just incredibly fascinating. The people who live this life, who create this training, who assist in these trainings, It's all poetry. I'm so glad I thought outside the box and tried this class. The personal growth I'm getting from this class is just enormous. I can't thank you all enough. Especially Chris for sharing his huge wealth of knowledge.

Terry W.

I could also imagine Dr. Who's Tardis - opening the hatch is space would be like opening the Tardis and being somewhere completely different from you you entered. - from small confined space to infinity and beyond ;) The disorientation must be incredibly challenging. I like the problem-solving regarding communication in space - how to reference a point or a direction that is meaningful and precise relative to both astronauts, or space station occupant and space-walker. How can 2 astronauts facing 2 different directions agree on where something is relative to both points of reference? Communication - so precise, so planned - and we have trouble with texts and e-mails. I had to chuckle at the things that had to be worked out. :)

Marc S.

This is undoubtedly my favorite lesson so far. We've already heard Chris describe numerous complexities in basic terms that we can all understand. However, I laughed hard twice during this lesson. The first was when Chris compared (at a basic level) the feeling of opening the hatch to reveal the universe to opening your bathroom door to reveal Mt. Everest. At the moment he mentioned bathroom door, I thought to myself "this is going to be a poor comparison". I was so wrong. I laughed hard again when he said "putting a square astronaut into a round hole". I love this class.

Bernard N.

Thank you for invitation to walk space training. Definitely it is highly complicated operations but the brain Astronaut is absorbed how behaviour body of Astronaut and what is around him. Extremely interested.

Warren D.

The information is mesmerizing and slightly surreal. It is hard to believe that we have come this far in space techniques and exploration, since I remember being amazed at listening to Star Trek and knowing it was probably never going to happen!

Vickie R.

Looks fascinating and exiting only unfortunately I suffer from claustraphobia after getting trapped in the elevator at the John Hancock which was the tallest building in Chicago at that time. Ever since I hate feeling locked in crowds. Sometimes when I go shopping for clothes, I panic if I can't get the dress back over my head??? Yeah I'd make a great Navy diver. I'm fine with just my little JAWS raft in my own swimming pool thank you very much. Even the ocean scares me. Everytime I go to Miami the beaches are swarming with either jelly fish or SHARKS. In the words of Richard Dreyfuss from "JAWS:- "We are going to need a bigger boat!" LOL.


The very first spacewalk was done by a guy named Alexey Leonov. And he just about died. He went out on the spacewalk. His suit inflated. It was way stiffer than anybody expected. He couldn't bend his arms. He couldn't bend at the waist. The airlock that they had hastily constructed, because it was during the days of the space race, was actually made of pressurized material. So it was almost like coming out of one of those bouncy castles. And he was outside on a spacewalk. He was only out for one big pass of Russia, just 10 minutes or something outside. But when he tried to get back in, none of their preparation had gotten him ready for what it was actually going to be like. And he just barely got back in. In fact, Alexey, who was a really good gymnast and a very fit man, he had to manually depressurize his spacesuit right down to the level where it could barely keep him alive, where he was risking the nitrogen boiling out of his blood and getting the bends just to make his suit flexible enough that he could somehow physically manhandle his way back inside, pull the airlock in, get the hatch closed, and accomplish our first spacewalk. We learned a lot from Alexey. And we also learned that we need to somehow prepare and simulate for spacewalking in a much more realistic manner than he did. And we thought, what's the most spacewalk-type environment that we have on Earth? It's underwater. It's like scuba diving. And so the very first American astronauts that were going to spacewalk, they actually went down to some of the Caribbean islands. So they had a lucky break to do their spacewalk training in the shallow water using some of the early scuba equipment to try and train and develop spacewalking techniques. But then they dug an underwater training facility at the Johnson Space Center in Houston, Texas. And ever since then, ever since Alexey first took a huge risk to try and figure it out, we've been training for spacewalks underwater. We build an entire piece of space hardware down there. In the early days, it was the Space Shuttle, because that's where all our spacewalks occurred from. But now there's a huge section of the International Space Station permanently underwater in one of the biggest swimming pools in the world just on the outskirts of Ellington Field by the Johnson Space Center. And that's where I spent hundreds and hundreds of hours underwater, days and days underwater, trying to learn how to operate a spacesuit, how to maneuver myself, how to think in three dimensions, but also how to invent spacewalking, how to develop all of the techniques. It's not so much like you're just going to class and learning how to do something. It's not like you just go to astronaut school and you get a certificate and now you're qualified. It's more you have to gain all these skills, but then you're part of the team that is applying those skills, since it's all so new, to invent new techniques to do things, so that you and your crew...