Long Duration Exposure Facility (LDEF)

NASA's Long Duration Exposure Facility, or LDEF, was a school bus-sized cylindrical space experiment rack that exposed various material samples to outer space for about 5.7 years, completing 32,422 Earth orbits.

It was carried into orbit onboard STS-41C and retrieved by STS-32.

This version of the LDEF patch is more crudely executed than another version.

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