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Columbia Houston we have a tally ho on l

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def called the long-duration exposure

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facility this 11-ton satellite had been

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in space for almost six years when a

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shovel frugal tree dipped and profits

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safely back to her prey touchdown or go

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home after delivery to the Kennedy Space

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Center in several months of close

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inspection l dev became an empty shell

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it's 57 external experiments were

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shipped to scientists around the globe

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including a group at NASA's Langley

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Research Center in Virginia the effects

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of long-term exposure to space can be

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seen in this materials and coatings

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experiment according to Wayne schlampe a

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senior engineer at Langley the various

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colorations and striping is evident on

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the surfaces here we're not present when

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L death was put in the world in fact the

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top of this panel looked exactly like

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its unexposed underside prior to the

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journey the goal is to determine the

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significance of these changes so that

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future spacecraft and structures can be

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built with the best possible materials

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Don Humes a Langley aerospace

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technologist had 22 aluminum panels

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positioned around

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their mission was simple be struck by

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micro meteoroids another man-made debris

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determining how many particles are out

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there where they are and what they're

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made of is critical in designing future

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research scientist Gale Harvey is

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discovering the de thermal control paint

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used almost universally on spacecraft

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can contaminate optical materials this

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unexpected brown staining will almost

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certainly result in an across-the-board

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change in surface coatings for space

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applications learning more about cosmic

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rays as the goal of an l def experiment

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at the naval research lab in Washington

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DC according to physicist Jim Adams

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cosmic rays are fast-moving particles

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that can penetrate human skin and

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disrupt onboard computers another factor

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to be considered in developing future

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space hardware technologically what will

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come out of L death is a set of

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handbooks which will be the Bible for

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how spacecraft are built for the next 20

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or 30 years I think would be a very long

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time before there's an opportunity to

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fly such a large spacecraft for such a

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long time and learn so much about the

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effects of the space environment more

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than 12 million tomato seeds carried on

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Al def have been distributed to students

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of all ages around the country

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the majority of the plants eventually

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produced my way through and the second

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generation mistake in addition to

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providing valuable information about the

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effects of space on living matter the

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scenes project is designed to excite

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young people about science the

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long-duration exposure facility six

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years of unparalleled information