This article applies to 5 students.^o A 8.^o degree.

Whenever the astronaut leaves the space vehicle, it is said to conduct external activities (EVA). This is also called space walk.

Russian astronaut Alexei Leonov conducted his first space walk on March 18, 1965. The first stroll lasted 10 minutes.

Astronaut Ed White performed the first American stroll on the Gemini 4 mission on June 3, 1965. White's space walk lasted 23 minutes.

Today, the space walk is outside the International Space Station (EEI). The space walk usually lasts five to eight hours, depending on the work to be done.

The world record of Russian astronaut Anatoly Solovyev is more space walks. He conducted 16 spaces in outer space, totaling more than 82 hours. Four NASA astronauts can take the maximum number of space walks. Michael López-Elegría (Mike La), Peggy Whitson, Bob Behnken and Chris Cassidy took 10 space walks respectively. Mike's longest time in a space walk. Its total is over 67 hours.

Astronauts take space walks for a number of reasons. Space trails allow astronauts to work outside the spacecraft while in space. What astronauts do on space walks are scientific experiments. Experiments can be held outside the spacecraft to understand how the space environment affects different objects. During a space walk, astronauts placed experiments outside the spacecraft. They went out again to recover the experiment.

Astronauts can also test new equipment and repair satellites or spacecraft in orbit. During a walk, astronauts can repair the equipment, otherwise they must be returned to Earth for repair.

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What you should know

Radiation: a form of energy emitted or transmitted in the form of rays, electromagnetic waves or particles

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Astronauts use space costumes when they take space walks. Space clothing protects them from difficult environments in space. They protect astronauts from extremely high heat and cold temperatures, harmful space powders and radiation. The spacesuit also allows astronauts to breathe and drink water during their walks.

Astronauts wear clothes in space costumes for hours before strolling. The clothing is pressurized. This means the outfit is filled with oxygen. The space garment is pressurized to keep the body fluid in a liquid state.

Once in the costume, the astronauts breathe 100% oxygen for several hours until all nitrogen leaves the body. During the process of walking in space, there is nitrogen in the body that can form bubbles in the body. These bubbles can cause astronauts to feel pain in joints such as shoulders, elbows, wrists, and knees. This condition is called "dive disease" or decompression syndrome. The same condition affects divers who use oxygen tanks to breathe underwater.

The astronauts are now ready to leave the spacecraft. They pass the spacecraft through a special door called the Air Gate. The aviation door has two doors. When the astronauts are inside the spacecraft, the valves are sealed, which means the air cannot be extinguished. As the astronauts prepare to walk out of space, they pass through the first door and close it tightly behind them. They can then open a second door without escaping from the spacecraft. After walking in space, the astronauts returned to the interior through the aviation gate. When the astronaut takes off his space suit, it is said that he will leave his suit.

Astronauts use handrails at the space station to move from one place to another. Sometimes large robot arms are used to move astronauts on a space walk. The astronaut's feet have robotic arms.

The astronauts are now ready to leave the spacecraft. They pass the spacecraft through a special door called the Air Gate. The aviation door has two doors. When the astronauts are inside the spacecraft, the valves are sealed, which means the air cannot be extinguished. As the astronauts prepare to walk out of space, they pass through the first door and close it tightly behind them. They can then open a second door without air breaking away from the spacecraft. After walking in space, the astronauts returned to the interior through the aviation gate.

Astronauts use seat belts to secure the spacecraft as they go on space walks. The belt is like a string. One end is hung on a space walker. The other end is connected to the vehicle. Seat belts prevent astronauts from moving away in space. Astronauts also use belts to prevent the tool from being removed. They tied tools to their space apparel with belts.

Another way for astronauts to stay safe during space walks is to use a backpack called Safer. What is safer is the acronym for the English aid rescue campaign. Safer to be used as a backpack. Use small reactive propellants to allow astronauts to move through space. If an astronaut releases and moves away from the float, it is safer to help him fly back to the spacecraft. Astronauts use small command poles to control it safer.

Astronauts are swimming in the way they train to walk in space. Floating in space is very similar to floating in water. Astronaut practice space strolls in a large swimming pool near the NASA Johnson Space Center in Houston, Texas.

This pool is called the Neutral Idle Laboratory (NBL). The pool has a capacity of approximately 23.5 million liters (6.2 million gallons). Every hour of a space walk, astronauts must train in the NBL pool for seven hours.

Another way for astronauts to take a space walk is by using virtual reality. The astronaut wears a helmet with a video screen and special gloves inside. The simulated video is displayed on the screen. Special gloves can show the astronaut's movements through video. VR simulations look and feel like a space walk.

Read this article here in English: What is Space Walking? (Grades 5 - 8)