Saturn from the Cassini orbiter [image credit: NASA]
This has been a tricky problem for years as explained below, and now appears to have been resolved. But whether that’s the end of the story remains to be seen.

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, reports Phys.org.

The length of a day on Saturn, according to their calculations, is 10 hours 33 minutes and 38 seconds.