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Nature 451, 29-31 (3 January 2008) | doi:10.1038/451029a; Published online 2 January 2008

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  • Director

    • McGill University
    • Montreal Canada
  • Scientist, Enzymology

    • Novo Nordisk Foundation Center for Protein Research, University of Copenhagen
    • Copenhagen 2200 Denmark

Astronomy: Extrasolar planets

Dimitar D. Sasselov1

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Hundreds of planets are known to orbit stars other than the Sun, and unprecedented observations of their atmospheres and structures are being made. It's an invaluable opening for understanding the planets' diverse natures, the formation of our Solar System, and the possibility of habitable planets beyond our home.

How many planets outside our Solar System have we found so far?

  1. Dimitar D. Sasselov is in the Department of Astronomy, Harvard University, Cambridge, Massachusetts 02138, USA, and the Harvard Origins of Life Initiative.
    Email: dsasselov@cfa.harvard.edu

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