Extravehicular Activity (EVA), are activities performed by space-suited astronauts outside their spacecraft in orbit above the Earth. This collection of 20 framed photographs and corresponding captions include those activities performed during an EVA, which may include satellite capture and repair, assembly/connection of exterior spacecraft components, or performing special experiments or tests.
EVAs may be either tethered (the astronaut is connected to the spacecraft; oxygen and electrical power can be supplied through an umbilical cable; no propulsion is needed to return to the spacecraft), or untethered. Untethered spacewalks were only performed on three missions in 1984 using the Manned Maneuvering Unit (MMU), and on a flight test in 1994 of the Simplified Aid For EVA Rescue (SAFER), a safety device worn on tethered U.S. EVAs.
The Soviet Union/Russia, the United States, Canada, the European Space Agency and China have conducted EVAs.
China became the third country to independently carry out an EVA on September 27, 2008 during the Shenzhou 7 mission. Chinese astronaut Zhai Zhigang completed a spacewalk wearing the Chinese-developed Feitian space suit, with astronaut Liu Boming wearing the Russian-derived Orlan space suit to help him. Zhai completely exited the craft, while Liu stood by at the airlock, straddling the portal.
Picture Credit : Google
