Maunder Minimum:A period of low sunspot activity between approximately 1645 and 1715 that coincided with part of the Little Ice Age.
Solar Activity: The fluctuating performance of processes occurring within and around the Sun, including sunspots, solar flares, and coronal mass ejections.
Sunspot: A temporary phenomenon on the Sun's photosphere that appears as spots darker than surrounding areas; they are associated with magnetic field fluctuations and are indicators of solar activity levels.