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Unexpectedly slow motions below the Sun's surface

• http://phys.org, byMax Planck Society
In its outermost third, the Sun behaves like a simmering pot of water: heat from below causes the plasma to rise to the surface where it is cooled and descends back down into the interior. This mechanism, named convection, transports energy outward and controls the Sun’s structure and evolution.
 
 In its outermost third, the Sun behaves like a simmering pot of water: heat from below causes the plasma to rise to the surface where it is cooled and descends back down into the interior. This mechanism, named convection, transports energy outward and controls the Sun’s structure and evolution.
 
The scientists, led by Shravan Hanasoge from Max Planck Institute for Solar System Research, were now for the first time able to constrain the flows deep within the convection layer from direct observations of the Sun’s surface with the help of helioseismology. Helioseismology is similar to Earth seismology. “We observe oscillations of the solar surface and use them to infer properties, such as flows, in the solar interior”, explains Laurent Gizon, director of the Department “Physics of the Interior of the Sun and Sun-like Stars” at the Max Planck Institute for Solar System Research and Professor at the Institute for Astrophysics at the University of Göttingen.

1 Comments in Response to

Comment by Olde Reb
Entered on:

 Well, consider that the sun is getting older.


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