Helioseismology studies the waves that travel through the Sun. The waves (vibrations) are increased by the temperature of the Sun and the deep motions inside the Sun.
Scientists can measure these waves at the Sun's surface. Since the waves are made deep inside the Sun, scientists use these waves to understand the Sun's inside. That is why helioseismology is called a diagnostic.
We can see these waves in other stars too.
60 foot tower at Mt. Wilson Observatory
where helioseismology work began in the 1960's
Click on image for full size (26K JPEG)
Image courtesy of of University of Southern
California, 60 Foot Solar Tower at Mt. Wilson Observatory.
A computer-generated image of a
wave moving through the interior of the Sun.
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