<P> 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 . Their number varies according to the approximately 11 - year solar cycle . </P>
<P> 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 . Their number varies according to the approximately 11 - year solar cycle . </P>
what are the dark spots on the sun called
what are the dark spots on the sun called
Sunspots
Sunspots