A spacewalk is also called an extravehicular activity (EVA). During an EVA, astronauts exit the spacecraft to work on its exterior. The longest spacewalk in history was conducted on March 11, 2001, by astronauts Susan Helms and Jim Voss. During the STS-102 mission of the shuttle Discovery, Helms and Voss set out to relocate a component on the ISS exterior and install a fixture on top of the station's U.S. Destiny laboratory. However, they encountered several difficulties, including tools that floated away into space and stubborn connectors that wouldn't come loose from the station's surface. The EVA clocked in at 8 hours and 56 minutes, 30 minutes longer than the previous record holder.
The Nine-Hour Spacewalk (And How It Could Help Us Prepare For Travel To Mars)
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