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juli 30, 2004
Hur unikt är vårt solsystem?
Nature-artikeln Earth-like planets may be more rare than thought skriver om forskare som studerat hur unikt vårt solsystem är.
Martin Beer of the University of Leicester, UK, and co-workers argue that our Solar System may be highly unusual, compared with the planetary systems of other stars. In a preprint published on Arxiv, they point out that the alien planets we have seen so far could have been formed by a completely different process from the one that formed ours. If that is so, says Beer, "there won't necessarily be lots of other Earths up there".
Papret som refereras är
M.E. Beer, A.R. King, M. Livio (2), J.E. Pringle
How special is the Solar System? (arXiv).
Abstract:
Most mechanisms proposed for the formation of planets are modified versions of the mechanism proposed for the solar system. Here we argue that, in terms of those planetary systems which have been observed, the case for the solar system being a typical planetary system has yet to be established. We consider the possibility that most observed planetary systems have been formed in some quite different way. If so, it may be that none of the observed planetary systems is likely to harbour an earth-like planet.
Se även
Martin Beer
Posted by hakank at juli 30, 2004 09:37 EM Posted to Diverse