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Great White Spots on Saturn: current and historical observations

McKim, R. J.

The bright spot in Saturn's North Tropical Zone which developed in 2010 December prompted the writer to collect together some rare and unpublished observations of previous Great White Spots (GWS) on the planet. As illustrated by series of observations in 1876, 1933 and 1990, and for 1903 and 1960, these GWS show a tendency to recur at intervals of…