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EVA Systems Patch
Item #: MPEVA

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EVA Systems Patch Extra-vehicular activity (EVA) is work done by an astronaut away from the Earth and outside of a spacecraft. The term most commonly applies to an EVA made outside a craft orbiting Earth (a spacewalk) but also applies to an EVA made on the surface of the Moon (a moonwalk). In the later lunar landing missions the command module pilot did an EVA to retrieve film canisters on the return trip. Due to the different designs of the early spacecraft, the American and Soviet space programs also define an EVA differently. Russians define an EVA as occurring when a cosmonaut is in a vacuum. An American astronaut, in contrast, is not considered to have made an EVA until at least his head is outside the spacecraft. The term stand-up EVA (SEVA) is used for being partly outside. EVAs may be either tethered (the astronaut is connected to the spacecraft, oxygen can be supplied through a tube, no propulsion is needed to return to the spacecraft) or untethered. When the tether performs life support functions such as providing oxygen, it is called an umbilical. For untethered EVAs during space flight, capability of returning to the spacecraft is essential
  • 4" embroidered patch
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    The Space Store is an online store offering fine quality space products from our on-line discount store. Shop our store to buy NASA gifts, SpaceX Products, Space Shuttle collectibles, International Space Station and Apollo space program products. Buy astronaut autographs, space and NASA memorabilia and collectibles, space toys, rockets, astronaut dolls, space LEGO toys, and astronaut costumes. We sell NASA flight suits, space shuttle flight jackets, NASA mission patches and mission insignia pins. Shop us for Fisher space pens, meteorite jewelry and astronomy toys.

    EVA Systems Patch