The Hipparcos  parallaxes imply that the canonical relationship between age and chromospheric activity breaks down after a certain age, thus reducing the estimated percentage of stars that have potentially exhibited this behavior.
The Hipparcos  parallaxes imply that the canonical relationship between age and chromospheric activity breaks down after a certain age, thus reducing the estimated percentage of stars that have potentially exhibited this behavior. In another study, using a two-dimensional chemical-radiative- transport model of the global atmosphere it was determined that a 3% drop in ozone was generated when the Sun experienced this. Sporer's law generally predicts the latitudinal variation of the primary observed feature, which was significantly decreased during this period. Similar periods of behavior have been historically observed in 16th and 19th centuries named after Sporer and Dalton, respectively. For 10 points, name this period of low solar activity that occurred from 1645-1715 in which there was an exceptionally low number of sunspots possibly accounting for the Little Ice Age.
The Hipparcos  parallaxes imply that the canonical relationship between age and chromospheric activity breaks down after a certain age, thus reducing the estimated percentage of stars that have potentially exhibited this behavior.
Maunder Minimum