Sunspot

Definition

Sunspots are temporary, dark areas on the solar surface caused by magnetic activity. They are cooler than surrounding regions and appear darker as a result.

5 Must Know Facts For Your Next Test

1. Sunspots have lower temperatures compared to their surroundings, typically around 3,800 K.
2. They occur in pairs or groups with opposite magnetic polarity.
3. The number of sunspots follows an approximately 11-year cycle known as the solar cycle.
4. Sunspots can be used to study the Sun's rotation and magnetic field patterns.
5. Instruments like solar telescopes and spacecraft help astronomers observe and analyze sunspots.

Review Questions

• What causes the formation of sunspots on the Sun's surface?
• How do sunspots help in studying the Sun's magnetic field?
• What is the typical duration of the solar cycle related to sunspot activities?

Related terms

Solar Flare: A sudden eruption of intense high-energy radiation from the sun's surface associated with sunspot activity.

Magnetic Field: A region around a magnetic material where magnetic forces are exerted, influenced by sunspot formations.

Granulation: The grainy appearance of the Sun’s surface caused by convection currents, contrasting with darker sunspots.