Dust could be the first material brought to Earth from outside our solar system

Dust could be the first material brought to Earth from outside our solar system
(Image credit: Twitter.com/NatureNews&Comment)

They weigh just 10 trillionths of a gram, but could help astronomers unlock the mysteries of a different galaxy.

The goal of the Stardust's mission was twofold: collect particles from the comet Wild-2’s tail end, and accumulate interstellar dust. Only two pieces of dust survived largely intact, and astronomers so far have been stunned by the diversity of the particles.

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"We're all made out of recycled dust — and we're just inherently interested in knowing what the dust we came from was like," Rhonda Stroud, a nanoastronomer at the Naval Research Laboratory in Washington and coauthor of a study on the dust, told the Los Angeles Times. "And this contemporary interstellar dust is giving us an idea of what new solar systems will be made of."

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Catherine Garcia, The Week US

Catherine Garcia has worked as a senior writer at The Week since 2014. Her writing and reporting have appeared in Entertainment Weekly, The New York Times, Wirecutter, NBC News and "The Book of Jezebel," among others. She's a graduate of the University of Redlands and the Columbia University Graduate School of Journalism.