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Astronomy and Astrophysics
Scientists think they have dust specks from outside our solar system
Scientists think they have dust specks from outside our solar system

Call them the seven wonders of interstellar space: Tiny specks of dust captured by a NASA spacecraft may be the first material from outside the solar system ever caught and brought to Earth. Researchers studying the contents of a capsule returned to Earth in 2006 at the conclusion of the Stardust spacecraft's primary mission believe that they have found seven remarkable specks on its collection panels. Although they weigh about 10 trillionths of a gram in all, the microscopic motes of "alien" dust described in the journal Science could alter astronomers' perception of the galaxy beyond our own stellar neighborhood. The Stardust mission was launched in 1999 on a...

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