Contains:  Solar system body or event
Sunspot AR3315, Leo Pires

Sunspot AR3315

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Description

Sunspots are regions on the surface of the Sun (photosphere) with a temperature lower than the local average and, therefore, in comparison with the surface of our star, they appear to be darker.

Sunspots have a high concentration of magnetic field. This concentrated magnetic field traps matter in the form of plasma, that is, very hot and ionized and electrically charged gas.

Every day, all sunspot regions on the Earth-facing solar disk are analyzed for their eruptive threat and assigned a number. This is done by NOAA's Space Weather Prediction Center. They are classified and numbered. The acronym "AR" stands for "Active Region".

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Sunspot AR3315, Leo Pires