What Are Sunspots and Why Do They Form?

Are Sunspots Permanent, Should I Worry About Sunspots?

Sunspots - NASA Science

For the first time ever, the world’s largest solar telescope has captured an X-class solar flare, a flare so powerful it can sometimes interfere with technology on Earth. “These flares are among the most energetic events our star produces, and we were fortunate to catch this one under perfect observing conditions,” one astrophysicist said. | Popular Science