Relicts from the Birth of the Solar System

Details Relicts from the Birth of the Solar System Relicts from the Birth of the Solar System

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001psrd.repte..48t&link_type=abstract

Planetary Science Research Discoveries

Other

Meteorites, Chondrites, Chondrule, Star Formation

Scientific paper

Two unusual meteorites may contain the record of heating and rapid transport by powerful jets while the Sun was still forming. The research, done by Alexander Krot (University of Hawai`i) and colleagues from Stanford University, the Natural History Museum of London, and the Carnegie Institution of Washington, supports ideas stemming from astronomical observations of young stars. The meteorites contain rounded objects that cooled very rapidly from a molten state. Their chemical compositions indicate formation from a cloud that had become enriched in dust before being completely evaporated. When the gas cloud cooled, the tiny droplets condensed, but were blown into much cooler regions far from the Sun before they had a chance to acquire moderately volatile elements such as sodium, potassium, and sulfur. They appear to have accreted into asteroids before other processes affected them, thus preserving the record of heating and jetting in the nebula that surrounded the infant Sun. The results support a theory of chondrule and star formation proposed by Frank Shu (University of California, Berkeley).

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