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ORIGINAL AB Emblem NASA - EVA SYSTEMS - VITRUVIAN MAN SHUTTLE SPACE PATCH

$ 6.3

Availability: 64 in stock
  • Country/Region of Manufacture: United States
  • NASA - EVA SYSTEMS: ORIGINAL FULLY EMBROIDERED NASA PATCH IS 4 1/4"
  • Return shipping will be paid by: Seller
  • Refund will be given as: Money Back
  • Modified Item: No
  • Condition: New
  • All returns accepted: Returns Accepted
  • Type: NASA Patch
  • Item must be returned within: 30 Days

    Description

    ORIGINAL AB Emblem NASA - EVA SYSTEMS - VITRUVIAN MAN SHUTTLE SPACE 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
    THIS ORIGINAL AB Emblem FULLY EMBROIDERED NASA PATCH IS 4 1/4" AND IS IN - MINT - CONDITION
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