Sunspots are dark regions on the Sun's surface caused by magnetic field concentration. They are cooler than the rest of the photosphere, reaching temperatures around 6,000°F. Sunspots can last from days to months and span 1,000 to 100,000 miles across
Sunspots are dark regions of strong magnetic fields on the sun's surface. They appear darker due to lower temperatures than surrounding photosphere. Sunspots can be as large as Earth, ranging from hundreds to tens of thousands of miles. The magnetic field in active regions can be 2,500 times stronger than Earth's
Sunspots are dark spots on Sun's surface caused by magnetic flux inhibiting convection. They appear in pairs of opposite magnetic polarity within active regions. Sunspots range in diameter from 16 km to 160,000 km. They have two main structures: dark umbra surrounded by brighter penumbra