Interstellar dust. Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft.
نویسندگان
چکیده
Seven particles captured by the Stardust Interstellar Dust Collector and returned to Earth for laboratory analysis have features consistent with an origin in the contemporary interstellar dust stream. More than 50 spacecraft debris particles were also identified. The interstellar dust candidates are readily distinguished from debris impacts on the basis of elemental composition and/or impact trajectory. The seven candidate interstellar particles are diverse in elemental composition, crystal structure, and size. The presence of crystalline grains and multiple iron-bearing phases, including sulfide, in some particles indicates that individual interstellar particles diverge from any one representative model of interstellar dust inferred from astronomical observations and theory.
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*Signatories: For the complete list of names and affiliations of persons who have endorsed this white paper, please see the " Signatories " link for this white paper on the following website: *This white paper has been posted on the CAPTEM website noted above and inputs to it were sought from the planetary science community at large. Numerous comments and suggestions were received from many mem...
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عنوان ژورنال:
- Science
دوره 345 6198 شماره
صفحات -
تاریخ انتشار 2014