Maunder Minimum
The period starting about 1645 and continuing to about 1715 when sunspots were exceedingly rare
en-GB/ˈmɔːndə ˈmɪnɪməm/
en-US/ˈmɑndɚ ˈmɪnəməm/
The period starting about 1645 and continuing to about 1715 when sunspots were exceedingly rare