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"  After spending nearly seven years in space and logging 2.88 billion miles, the Stardust spacecraft is finally facing a peaceful retirement. Its record-breaking 29,000-mph atmospheric re-entry, on the other hand, hardly qualifies as serene. The capsule will plummet to Earth just faster than the speed of sound and\u2014assuming that its parachutes activate as planned\u2014arrive safely at the Air Force&amp;#039;s Utah Testing and Training Range on January 15. The capsule contains a two-sided collector, shaped like a tennis racquet, that is made of a light, porous material called aerogel. With one side, the collector has captured interstellar dust grains that drift through the solar system like so much, well, dust. On the other side it holds grains from the Wild 2 comet, many of which are well-preserved presolar particles. Both samples are expected to provide clues about the origins of our solar system. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/space/deep-space/a344/2082186/>