Gas steers sun's magnetic fields.
About 20,000 kilometers beneath the sun's surface, magnetic fields rise no faster than about 500 kilometers per hour. That speed (roughly one-third of previous estimates) is about the same speed that gas rises and falls within the sun, implying that moving parcels of gas help steer magnetic fields toward the surface, researchers report July 13 in Science Advances. Aaron Birch of the Max Planck Institute for Solar System Research in Gottingen, Germany, and colleagues estimated the speed by combining observations of the sun's surface with computer simulations of how gas moves within the hot orb. By studying the sun's inner workings, researchers hope to understand what drives sunspots and flares--the blemishes and eruptions triggered by magnetic fields punching through the surface.
500 kilometers per hour Maximum speed at which the sun's magnetic fields rise to the surface
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|Title Annotation:||SCIENCE STATS|
|Article Type:||Brief article|
|Date:||Aug 20, 2016|
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