Daily cosmobite: our shaking star

atest_1024_HMID_SDO-Dopplergram_23-April-2013.jpgDid you know that our nearest star, the Sun, not only shows sunspots but is also shaking? The violent motion of gases in the outer layers of the Sun triggers waves of small scale shaking or vibration. These waves repeat every five minutes or so and take only a few hours to travel across the star.

A dopplergram of the Sun showing waves on its surface. Courtesy SDO/HMI


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