What are sun spots?

Sunspots are darker, cooler areas on the surface of the sun in a region called the photosphere. The photosphere has a temperature of 5,800 degrees Kelvin. Sunspots have temperatures of about 3,800 degrees K. read more

Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Sunspots usually appear in pairs of opposite magnetic polarity. read more

Sunspots or solar lentigines are dark portions of the skin that develop after prolonged exposure to direct ultra violet or UV rays. People of all ages are susceptible to these spots, though those with lighter skin tend to develop them more frequently. read more

The sunspot number is calculated by first counting the number of sunspot groups and then the number of individual sunspots. The"sunspot number" is then given by the sum of the number of individual sunspots and ten times the number of groups. read more