Astronauts go on spacewalks for many reasons, whether to repair satellites or spacecraft in space. By going on spacewalks, astronauts can fix things like solar panels instead of bringing them back to Earth to fix and also do science experiments. Experiments can be placed outside a spacecraft, letting scientists learn how being in space affects different things.
When astronauts go on spacewalks, they wear spacesuits to keep themselves safe. Inside spacesuits, astronauts have the oxygen they need to breathe and the water they need to drink.
The safety tethers attached to the ship keep astronauts from floating away into space. Astronauts also use jetpacks, which are essentially small jet thrusters to get them back to their craft quickly in case of an emergency. If an astronaut were to become untethered and float away, SAFER (Simplified Aid for EVA Rescue, the acronym used for these jetpacks) would help him or her fly back to the spacecraft. Astronauts control SAFER with a small joystick, like a video game controller.
In a spacewalk, also known as Extra-Vehicular Activity (EVA), an astronaut literally walks in space, exiting the relative safety of their spacecraft in order to perform exterior repairs on things like solar panels. They are dangerous, physically demanding, and rare too.
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Abhiram K
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