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interplanetary dust

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Noun1.interplanetary dust - microscopic particles in the interplanetary medium
interplanetary medium - interplanetary space including forms of energy and gas and dust
dust - free microscopic particles of solid material; "astronomers say that the empty space between planets actually contains measurable amounts of dust"


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National Laboratory analyzed an interplanetary dust particle collected by a NASA aircraft from Earth's stratosphere, they discovered organic material older than the solar system.
Space invaders: the stuff of life has far-flung origins by Goho, Alexandra / Science News
These researchers speculate that precursors to life might have arrived on an asteroid, meteorite, comet, or even interplanetary dust (SN: 2/3/01, p.
Cosmic Chemistry Gets Creative by GORMAN, JESSICA / Science News
The materials could have hitched a ride to Earth on comets, meteorites, or interplanetary dust.
Life's housing may come from space by Cowen, R. / Science News
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