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View Full Version : Alpha Centauri's Sounds Measured



Fraser
2005-Dec-21, 08:52 PM
SUMMARY: Astronomers have used the ESO's Very Large Telescope to measure the stellar vibrations of a nearby star. The team studied Alpha Centauri B, one of our closest neighbours - only 4.3 light-years away - and relatively similar to our own Sun. Churning gas in the star's outer layers creates low-frequency sound waves that bounce around inside the star and cause it to pulse in and out slightly. The star only changes about a dozen metres every four minutes, but that makes enough of a change in the wavelength of light we see to be able to detect it.

View full article (http://www.universetoday.com/am/publish/vlt_tortoise_motion.html)
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