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Cryogenics

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Uploaded by on Feb 10, 2010

Air Force physicst, Erin PettyJohn, designs cryocoolers, little refrigerators that cool NASAs Hubble Space Telescope and ensure its camera can send images back to earth. For more information, see the National Defense Education Programs "Lab TV": http://ndep.us/LabTV2.aspx
Check out more DoD videos at http://dodvclips.mil

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