Orion orbits the moon with disc-shaped solar arrays tracking the sun to generate electricity. Image Credit: Lockheed Martin Corp.
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![The "planetary surface habitat and airlock unit" has been delivered to NASA Langley for ground-based evaluation of emerging technologies such as health monitoring of flexible structures. Credit: NASA/Jeff Caplan](http://www.gerhards.net/albums/constellation/2007_habitat.thumb.jpg "The "planetary surface habitat and airlock unit" has been delivered to NASA Langley for ground-based evaluation of emerging technologies such as health monitoring of flexible structures. Credit: NASA/Jeff Caplan"){kind=small}
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