Dr. Glenn
Macpherson
Smithsonian
Cosmochemical Evidence for
Astrophysical Processes in the Early Solar System
Isotopic and other studies of primitive material left over from the birth of
the Solar system, such as chondrite meteorites and captured comet dust, provide
evidence for the conditions, processes, and even timing of processes that
occurred during the first ~ 1 m.y. of the solar system’s existence. The Sun
likely was born in a giant molecular cloud similar to Orion and Carina, and its
birth may have been immediately preceded by a nearby supernova. There also is
good evidence that our Sun experienced bi-polar outflow during its infancy, a
process that resulted in innermost-solar-system solid materials being ejected
out to at least the asteroid belt and possibly as far as the comet accretion
regions.
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