Computer Science
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978newsc..78..361p&link_type=abstract
New Scientist, vol. 78, May 11, 1978, p. 361-363.
Computer Science
Abundance, Planetary Evolution, Solar System, Supernovae, Aluminum 26, Isotopes, Magnesium Isotopes, Meteoritic Composition, Mineralogy, Solar System, Origin, Meteorites, Samples, Lunar, Popular, Allende Meteorite, Isotopes, Aluminum, Magnesium, Superheavy Elements
Scientific paper
Determinations of the ratios of the isotopes of certain elements in the material of the Allende meteorite, which fell in northern Mexico in 1969, has led to conclusions that the collapse of the presolar nebula to form the sun and the planets might have been triggered by a nearby supernova. It is widely assumed that the meteorite is composed of minerals formed during the early stages of condensation of the solar nebula. An examination of the abundances of the various isotopes of the constituent elements should, therefore, reveal details of the sources of the meteorite's material. On the basis of the results of such examinations, it is concluded that a supernova did indeed enrich the presolar dust cloud and that it must have done so within a few aluminum-26 half-lives of the formation of the Allende fragments, that is, within roughly two million years.
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