Hadean aeon


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Noun1.Hadean aeon - the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life
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Among specific topics are primordial massive supernovae as molecular factories at high redshifts, observational evidence for dust growth in proto-planetary discs, hydrous-carbonaceous meteoroids in the Hadean Aeon, dust in clusters of galaxies, probing dust with gamma-ray bursts, analogs of cosmic dust, intersteller ices, and interstellar dust models and evolutionary implications.