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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: The Source of Saturn's Radio
5 August 2010 12:01 pm
Welcome to KSAT, the radio station broadcasting from the poles of Saturn. For years, scientists have been puzzled by the pulsing intensity of radio emissions from the ringed planet. Puzzling, because the scientists couldn't key the pulses to any known phenomenon. The 11-hour intervals approximated but didn't match Saturn's rotation rate, so the planet's magnetic field couldn't be the source. Nor could scientists find any connection between the radio-signal intensity and variations in the solar wind. Now researchers examining 5 years of images from the Hubble Space Telescope and the Cassini spacecraft, which orbits Saturn and its moons, say they've found a clue. In an upcoming issue of Geophysical Research Letters, a team reports that the variations in radio signal coincide with the intensity of the planet's auroras. That revelation doesn't solve the mystery, however. So scientists have started looking for the cause of the auroral variations. One prime candidate: particle emissions from Saturn's moon Enceladus.
See more ScienceShots.