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Milky way “vibrating like a drum”


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Our Milky Way galaxy is warped, and vibrates like a drum, because of the influence of two small companion galaxies, astronomers have found...

...the vibration consists almost wholly of three “notes,” also called modes. These notes would be unimaginably deep by human standards—some three million octaves, or scales, below the note called middle C on a piano.

This means that if a piano could play these notes, it would require a keyboard about the width of Iceland to do so.

http://www.world-science.net/othernews/060110_drumfrm.htm

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