Un fenomenale articolo sul suono delle stelle. In sintesi, è la dimostrazione scientifica della teoria pitagorica dell’ “armonia delle sfere” , cioè del fatto che le stelle emettono dei suoni. Addirittura, è possibile fare download di quattro di queste. Una domanda: caro Altotas, ma non sarebbe meglio tenerli nascosti questi files? Risposta: io sono una antenna, capto energie e le trasmetto. Non ho interesse a tenere nascosto o riservato il lume. La luce è universale. Bisogna essere coerenti, se si vuol essere illuministi fino in fondo, se si vuole tentare l’illuminazione. Quindi, rendo tutto disponibile a tutti. Chi ha orecchi per intendere, intenda!
Aug. 13, 2006 (Sirio birthdate)
Courtesy Sheffield Hallam University
and World Science staff
Ancient Greeks thought planets and stars were embedded in vast crystal spheres that hummed as they spun around the heavens, giving off what the ancients called “the music of the spheres.”
It was a beautiful idea, and wrong.
But not totally wrong. There are no crystal spheres; but as astronomers found out in the 1970s, “the sun and other stars do actually ‘sing,’” said astronomer Donald Kurtz of The University of Central Lancashire in Preston, U.K.
The eerie tones are now downloadable (see sidebar.)
Stars—themselves spherical—can produce notes through their vibrations, like musical instruments.
We can’t hear the sounds directly, but “astronomers can detect them through asteroseismology—looking beneath the surfaces of the stars into their cores,” Kurtz said.
“We can see inside the Sun as clearly as you can see a fetus in the womb using ultrasound.”
Experts worldwide discussed asteroseismology at a conference early this month at the University of Sheffield, U.K.
Stars produce ghostly whistling, drumming, humming or rumbling sounds, said Kurtz, though their frequencies—or speeds of vibration—must be artificially boosted to bring them into human hearing range.
At a lecture at the conference, Kurtz demonstrated how Bach would sound if played by the stars, combining pitches from different stars into a computer-projected melody. He also used helium, cymbals and bottles to recreate stellar sounds.
“Stars have natural vibrations that are sound waves, just as musical instruments do,” Kurtz explained.
“In the case of an instrument such as a horn, the cause of the vibrations is the musician blowing on the horn and buzzing his or her lips at a frequency that matches the natural vibrations of the horn. For the star, the vibrations start by changes in the passage of energy from the nuclear inferno in the heart of the star on its way to the surface, and escape into space.”
Early last year, researchers published a paper noting that a massive quake had left a so-called neutron star vibrating like a bell, sounding a note corresponding to what humans designate as F sharp. Early this year, scientists reported that not only stars vibrate musically—the whole Milky Way is oscillating as well, like a drumhead.
“Understanding the sounds of the stars is important for our understanding of the formation of the solar system and the Earth,” Kurtz said. Using asteroseismology “We can even monitor dangerous ‘active’ regions on the far side of the Sun.” These stormy zones can later send out blasts that create geomagnetic storms on Earth, leading to power failures and radio disruption.