![]() Credit: Dan Seaton/European Space Agency (Collage by NOAA/JPL-Caltech) As the cycle ends, it fades back to the solar minimum and then a new cycle begins.Įvolution of the Sun in extreme ultraviolet light from 2010 through 2020, as seen from the telescope aboard Europe's PROBA2 spacecraft. The middle of the solar cycle is the solar maximum, or when the Sun has the most sunspots. Over time, solar activity-and the number of sunspots-increases. ![]() The beginning of a solar cycle is a solar minimum, or when the Sun has the least sunspots. ![]() One way to track the solar cycle is by counting the number of sunspots. Video credit: NASA's Scientific Visualization Studio This visualization represents the constant changing of the Sun’s magnetic field over the course of four years. ![]()
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