Physics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992itps...20..577b&link_type=abstract
IEEE Transactions on Plasma Science (ISSN 0093-3813), vol. 20, no. 6, p. 577-589.
Physics
3
Field Aligned Currents, Magnetohydrodynamic Waves, Prediction Analysis Techniques, Solar System, Ion Production Rates, Plasma Layers, Uranus Rings
Scientific paper
The research of Hannes Alfven and his colleagues on solar system physics is examined in order to determine whether scientists actually follow the policy of judging a theory by its ability to make successful predictions. Tests of seven predictions are considered: magnetic braking, MHD waves, field-aligned ('Birkeland') currents, critical ionization velocity and the rings of Uranus, jet streams, electrostatic double layers, and partial corotation ('2/3 effect'). The success or failure of these predictions was found to have essentially no effect on the acceptance of Alfven's theories. It is inferred that the role of prediction as a means of evaluating scientific theories has been exaggerated.
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