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Nature 425, 137-139 (11 September 2003) | doi:10.1038/425137a
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Gastroenterologist
- Wayne State University
- Detroit, Michigan, USA
John Innes Centre Project Leader in Plant or Microbial Sciences
- University of East Anglia
- Norwich, NR4 7TJ, UK
Cosmochemistry: Inside the cosmic blender
Alex N. Halliday1
Abstract
The Solar System has a largely uniform isotopic composition but with tantalizing small variations. Geochemists are trying to ascertain the mechanisms and types of stars that produced this state of affairs.
Long before astronomers presented us with spectacular images of the material swirling around other stars, Pierre-Simon Laplace (1749–1827) proposed that the planets of our Solar System formed from a circumstellar disk. The scale and degree of isotopic heterogeneity of the matter in our Solar System provide unique insights into the dynamics associated with the development of these disks, and on page 152 of this issue Becker and Walker1 highlight some of the problems associated with one class of the isotopes concerned — those of molybdenum.
- Department of Earth Sciences, ETH Zentrum, NO C61, Sonneggstrasse 5, Zurich CH-8092, Switzerland.
Email: halliday@erdw.ethz.ch
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