Sunday, August 19, 2012

The Music of the Spheres: The Ringing Earth


Did you know that the singing Sun makes the Earth ring like a bell?

Apparently the vibrations and oscillations within the sun that I wrote about in last week’s blog generate sympathetic waves in our Earth, its atmosphere and its magnetic field, making them vibrate as well.


This discovery is the result of research conducted during the Ulysses mission, a joint venture by NASA and the European Space Agency.  Together they designed and launched a robotic space probe, Ulysses, named after the hero (aka Odysseus) of Homer’s epic poems the Iliad and the Odyssey, to study the Sun.


The Ulysses mission, launched in 1990 aboard the space shuttle Discovery, ended in 2009 as the power output became too low to keep the fuel from freezing.  But in its years in space it made some fascinating discoveries about the Sun and its interactions with Earth.  In extremely simplified form (mainly because this is way over my head) the lead Ulysses researchers think that the Sun’s sound-generating pressure and gravity waves are picked up by its magnetic field and then carried through space as part of the solar wind. As the solar wind reaches our atmosphere it causes vibrations in and around the Earth.  Ulysses was able to detect these signals.  In fact, even planet-based technological systems can sense the vibrations in the Earth’s magnetic field and in the planet itself.

Modern orchestras tune to A above middle C, at 440 Hertz.  (It’s common among musicians to refer to “A 440,” especially since early music specialists typically tune to an A that is slightly lower.)   The tones ringing out from our Earth are far, far deeper than that, fully twelve octaves below the range of human hearing, which means they are somewhere in the 100-5000 microhertz range (a microhertz is one millionth of a hertz).  That means one frequency vibration every 11 ½ days!

How is it that the ancient Greeks grasped the truth of something we are only just now discovering?

From Harmony, from heavenly Harmony
         This Universal Frame began;
    When Nature underneath a heap
         of jarring Atomes lay,
    And could not heave her Head,
The tuneful Voice was heard from high,
     ‘Arise, ye more than dead.’
Then cold and hot and moist and dry
     In order to their Stations leap,
         And MUSICK’S power obey.
  From Harmony, from heavenly Harmony
         This Universal Frame began:
         From Harmony to Harmony
Through all the Compass of the Notes it ran,
The Diapason closing full in Man.

                                    First verse from A Song for St. Cecilia’s Day
                                                John Dryden, 1687

Dr. Linda Gingrich
Artistic director and conductor
Master Chorus Eastside


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