The Sun is playing a secret melody, hidden inside itself, that produces a widespread throbbing motion of its surface. The sounds are coursing through the Sun's interior, causing the entire globe, or parts of it, to move in and out, slowly and rhythmically like the regular rise and fall of tides in a bay or of a beating heart. The sun is quietly singing. It’s boiling and throbbing gases create sound waves that resonate like a bell or a giant gong within its interior. These oscillations are visible as waves when they reach the surface, but their frequencies are too low to be audible by human ears. Fortunately, astronomers at Stanford University are able to record these acoustical pressure waves and speed them up approximately 42,000 times in order to produce a frequency that we can hear. The result is a tone or a musical note whose frequency is 144 cycles per second.

Circadian Harmonics