The solar cycle refers to the 11-year cycle of changes in the sun's activity, specifically in terms of sunspots, solar flares, and solar radiation. This cycle is driven by the sun's magnetic field, which undergoes a complete reversal in polarity every 11 years. The solar cycle has a significant impact on space weather, including the occurrence of geomagnetic storms, auroras, and disruptions to satellite communications and power grids on Earth. Understanding the solar cycle and its effects is important for predicting and mitigating potential risks to technology and infrastructure. Researchers study the solar cycle using a combination of satellite observations, ground-based measurements, and computer simulations.