<P> Extravehicular activity ( EVA ) is any activity done by an astronaut or cosmonaut outside a spacecraft beyond the Earth 's appreciable atmosphere . The term most commonly applies to a spacewalk made outside a craft orbiting Earth ( such as the International Space Station ) , but also has applied to lunar surface exploration ( commonly known as moonwalks ) performed by six pairs of American astronauts in the Apollo program from 1969 to 1972 . On each of the last three of these missions , astronauts also performed deep - space EVAs on the return to Earth , to retrieve film canisters from the outside of the spacecraft . Astronauts also used EVA in 1973 to repair launch damage to Skylab , the United States ' first space station . </P>
<P> Extravehicular activity ( EVA ) is any activity done by an astronaut or cosmonaut outside a spacecraft beyond the Earth 's appreciable atmosphere . The term most commonly applies to a spacewalk made outside a craft orbiting Earth ( such as the International Space Station ) , but also has applied to lunar surface exploration ( commonly known as moonwalks ) performed by six pairs of American astronauts in the Apollo program from 1969 to 1972 . On each of the last three of these missions , astronauts also performed deep - space EVAs on the return to Earth , to retrieve film canisters from the outside of the spacecraft . Astronauts also used EVA in 1973 to repair launch damage to Skylab , the United States ' first space station . </P>
what is a mission performed outside the space station
what is a mission performed outside the space station
Extravehicular activity ( EVA )
Extravehicular activity ( EVA )