View Full Version : Measuring a Day on Saturn

2006-May-05, 06:55 PM
SUMMARY: With solid planets, like the Earth and Mars, it's easy to track the length of their days. Just watch for a surface feature to rotate into view again. With gas giants, however, it's a tricky business. Scientists have used features of Saturn's magnetic field to act like objects on its surface; tracking the amount of time it takes for that point in the magnetic field to rotate around again. Cassini has determined that Saturn's day is 10 hours, 47 minutes, 6 seconds (+- 40 seconds).

View full article (http://www.universetoday.com/am/publish/saturnian_day.html)
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2006-May-05, 07:44 PM
When we know why the magnetic fields rotation rate in Saturn changes so much we'll know something big about the internal structure of the planet.