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Universe
[ Universe ]

·Astronomy: Universe - Stars-THE STARS FROM EARTH
·Astronomy: Universe - INVISIBLE SIGNALS
 

 
 
Astronomy & Telescope Astronomy: Sun Structure

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  Sun Structure Sun Structure: Astronomy: Sun Structure - A HOT HEART

A HOT HEART

Solar astronomers use a technique called helioseismology to look below the surface of the Sun. Using telescopes positioned around the Earth (to keep the Sun under Hconstant watch), they study subtle pulsations in the Sun's surface. These pulsations— essentially sound waves— probe the Sun's interior in much the same way that seismic waves from earth-quakes enable geophysicists to study our planet.

 
 
  Posted by astronomy on Friday, December 10 @ 18:48:02 CST (8 reads)
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  Sun Structure Sun Structure: Astronomy: Sun Structure - THE FUTURE OF OUR STAR

THE FUTURE OF OUR STAR

Astronomers predict the future of the Sun by looking at what has happened to similar stars. Its life is now about half over. As it consumes hydrogen in its core, leaving an "ash" of helium behind, the Sun will grow hotter and brighter.

 
 
  Posted by astronomy on Friday, December 10 @ 18:47:01 CST (9 reads)
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  Sun Structure Sun Structure: Astronomy: Sun Structure - Corona-THE PEARLY CORONA

THE PEARLY CORONA

Above the Sun's photosphere lies a thin, cool, pinkish layer called the chromosphere. It is visible only during solar eclipses or through an H-alpha filter. The top of the chromosphere merges into the corona, the Sun's vast outer atmosphere, which reaches outward at least 10 times the solar radius.

 
 
  Posted by astronomy on Friday, December 10 @ 18:46:09 CST (8 reads)
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  Sun Structure Sun Structure: Astronomy: Sun Structure

THE STRUCTURE OF THE SUN

The Sun is a vast, layered structure, comprising all but a small fraction of the mass of the entire Solar System.

 
 
  Posted by astronomy on Thursday, December 09 @ 13:39:06 CST (10 reads)
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