Waves in Saturn's rings give precise measurement of planet's rotation rate

Saturn's distinctive rings were observed in unprecedented detail by NASA's Cassini spacecraft, and scientists have now used those observations to probe the interior of the giant planet and obtain the first precise determination of its rotation rate. The length of a day on Saturn, according to their calculations, is 10 hours 33 minutes and 38 seconds.

from Space Exploration News - Space News, Space Exploration, Space Science, Earth Sciences