Sun Detail | 12.31.2024
The sunspots you see are dark, cooler regions on the Sun’s surface caused by intense magnetic activity. They vary significantly in size, typically ranging from about 1,500 kilometers (932 miles) to 50,000 kilometers (31,068 miles) in diameter. To put this into perspective, many sunspots are as large as Earth, which has a diameter of approximately 12,742 kilometers (7,918 miles). Some sunspots can grow even larger; for instance, the largest sunspot ever recorded, AR 14886, was nearly the diameter of Jupiter—about 88,846 miles (142,984 kilometers).
Sunspots expand and contract as they move across the Sun’s surface and can last from several days to a few months. Their size and frequency fluctuate in an approximately 11-year cycle known as the solar cycle, with more and larger sunspots appearing during periods of increased solar activity.
It’s important to note that while sunspots appear dark compared to the surrounding solar surface, they are still extremely bright. If isolated from the Sun, a sunspot would shine brighter than the full Moon. © 2025 John Bulmer Photography, John Bulmer Media, and Nor'easter Films
www.bulmerphotography.com
www.johnbulmermedia.com
www.noreasterfilms.com
Sunspots expand and contract as they move across the Sun’s surface and can last from several days to a few months. Their size and frequency fluctuate in an approximately 11-year cycle known as the solar cycle, with more and larger sunspots appearing during periods of increased solar activity.
It’s important to note that while sunspots appear dark compared to the surrounding solar surface, they are still extremely bright. If isolated from the Sun, a sunspot would shine brighter than the full Moon. © 2025 John Bulmer Photography, John Bulmer Media, and Nor'easter Films
www.bulmerphotography.com
www.johnbulmermedia.com
www.noreasterfilms.com
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