Solar Dynamics Observatory/NASA

The Sun's Sound Waves Reveal That Its Surface Is Thinning

Celestial acoustic research shows that the sun's outer layers are more sensitive to medium and higher frequencies, indicating that some areas of the solar surface have weakened.

July 11, 2017
6:21 PM EDT
The sun's magnetic waves are more concentrated in certain regions of the solar surface. | Solar Dynamics Observatory/NASA
Observations by the Helioseismic and Magnetic Imager on NASA's Solar Dynamics Observatory show a two-level system of circulation inside the sun. | Stanford