The large magnetic fields in sunspots decrease the flow of heat via convection causing the sunspot to become cool.
Sunspots are low temperature regions in the photosphere
Sunspots can be used to measure the rotation of the Sun
Near the equator the Sun rotates once in 25 days.
The poles rotate more slowly, about once every 36 days.
Each 11 years, the Sunís magnetic field changes direction. Overall cycle is 22 years.
What direct observational evidence supports the model of thermonuclear reactions in the Sunís core?
Sun spot counts
Coronal mass ejections
Particles spiral around magnetic field lines
Motion of charged particle (electron, proton, nucleus)
Particles, that we see, get trapped along magnetic field lines, that we donít see, stretching out from the Sun.
Coronal mass ejections eruption of gas, can reach Earth and affect aurora, satellites
Which statement is not correct?
The solar coronal temperature is about 106 K.
Sunspots are very cool and dark, with temperatures of about 300 K.
The Sunís core has a temperature about 107 K.
The chromosphere is hotter than the photosphere.