Sun’s magnetic interior mapped for first time

A new study has reconstructed a three-dimensional picture of the Sun’s internal magnetic field using decades of satellite data, allowing researchers, for the first time, to follow how solar magnetism evolves beneath the surface.

“Observationally, none of the techniques used are able to provide an estimation of the interior magnetic field. We reconstruct, for the first time, the dynamics of the interior large-scale magnetic fields,” the study authors note. 

The sun’s magnetic field is created by the motion of hot, electrically charged gas inside it. This process, called the solar dynamo, operates deep below the surface. The problem is that no instrument can directly measure magnetic fields in those layers and satellites only record what happens on the surface.

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