Das Bild zeigt den Allende-Meteoriten, der 1968 auf die Erde gefallen ist. Er ist 4.56 Milliarden Jahre. Die braunen Fragmente (chondren) sind Schmelztröpfchen, die bei einem Kosmischen Gewitter vor 4.56 Milliarden Jahren enstanden sind. Das weiße Fragment ist eines der ältesten Kondensate im Sonnensystem (4,567 Milliarden Jahre). Seit dem letzten Jahr erst ist bekannt, dass Eisen-Meteorite noch älter sind.
Foto: Prof. Dr. Carsten Münker
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