Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft
Ist Teil von
Science (American Association for the Advancement of Science), 2014-08, Vol.345 (6198), p.786-791
Ort / Verlag
Washington: American Association for the Advancement of Science
Erscheinungsjahr
2014
Quelle
American Association for the Advancement of Science
Beschreibungen/Notizen
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.