How long can sunspots last, according to observations?

Sunspots are regions on the sun’s surface that are cooler than the surrounding areas and appear darker. They can indeed last for various lengths of time based on their activity and position in the solar cycle. Observations have shown that sunspots can persist for extended periods, with some lasting up to a year and a half.

The lifecycle of a sunspot typically begins with its formation and can span several cycles of activity as it develops and ultimately dissipates. The duration is influenced by solar activity and the magnetic fields within the sun. The fact that sunspots can last for as long as a year and a half demonstrates their dynamic nature, as they undergo phases of growth and decay over time.

This significant duration highlights the complexity of solar phenomena and links back to broader studies of solar behavior, including the impacts of sunspots on solar radiation and the Earth's climate.