The Manned Maneuvering Unit (MMU) is a backpack propulsion device that gave astronauts mobility for extravehicular activities outside the Space Shuttle. It enabled them to maneuver within the payload bay or fly some distance away without needing safety tethers anchored to the vehicle.

Photographer:

Dane Penland

ID#:

SI-2006-104

Source:

Smithsonian's National Air and Space Museum

Copyright/Owner:

Smithsonian Institution

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