Why Do Astronauts Go on Spacewalks?
Any time an astronaut gets out of a vehicle while in space, it is called a spacewalk. A spacewalk is also called an EVA. EVA stands for extravehicular activity. When astronauts go on spacewalks, they wear spacesuits to keep themselves safe.
Inside spacesuits, astronauts have the oxygen they need to breathe. They have the water they need to drink. Astronauts go on spacewalks for many reasons. Spacewalks let astronauts work outside their spacecraft while still in space. Astronauts can do science experiments on a spacewalk.
Experiments can be placed on the outside of a spacecraft. This lets scientists learn how being in space affects different things. Spacewalks also let astronauts test new equipment. They can repair satellites or spacecraft that are in space.
By going on spacewalks, astronauts can fix things instead of bringing them back to Earth to fix. Spacewalks usually last between five and eight hours, depending on the job.