Inside the Sun’s Pulse: The Hidden Engine Behind Sunspots and Solar Storms If you look at the Sun in visible light, it seems calm and steady—a glowing yellow disk that rises and sets with dependable regularity. But beneath that serene appearance lies a churning, restless engine. The image you’re looking at reveals the Sun not as a static ball of fire, but as a dynamic, evolving star whose internal motions drive an 11-year rhythm known as the solar cycle. This cycle shapes everything from sunspot

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