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).
On 18 March 1965, Soviet/Russian cosmonaut Alexey Arkhipovich Leonov became the first human to conduct extravehicular activity, exiting the capsule during the Voskhod 2 mission for a 12-minutes spacewalk. Leonov had no means to control his motion other than pulling on his 5.35 m tether.
http://en.wikipedia.org/wiki/Extravehicular_activity
http://en.wikipedia.org/wiki/Alexey_Leonov
http://en.wikipedia.org/wiki/File:Voskhod2.jpg#/media/File:Voskhod2.jpg
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