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作者:  时间: 2010-10-28

Daniel Huber is a doctoral student at the University of Sydney in Australia. He is a member of an international team of astronomers that is using data from NASA's Kepler spacecraft to study stars and their structures.  wholesale prada handbags Kepler uses a huge digital camera to continuously monitor the brightness of more than 150,000 stars as it orbits the sun.


Huber is among the scientists who study red giant stars, which are nearing the ends of their lives.
chanel bagsScientists say the stars get older, temperatures near their cores rise and their sizes expand."Every red giant that we've detected oscillations in has its unique sound, its unique amplitude and frequency, and we can therefore say that Kepler is basically listening to thousands of "musicians" in the sky," he said.

It comes down to asteroseismology, which is the study of star oscillations. So-called "starquakes" show up as periodic variations in the brightness of the stars.
 coach bags  They help asteroseismologists learn about the inner structure of stars in the same way that seismologists use earthquakes to learn about inner Earth.