A day on Saturn-the time it takes for the planet to complete one full rotation on its axis-is about 10 hours, 33 minutes, and 38 seconds. This precise measurement was determined using data from NASA's Cassini spacecraft, which analyzed wave patterns in Saturn's rings caused by vibrations within the planet itself. These vibrations affect Saturn's gravitational field, and the rings act like seismographs, revealing the planet's rotation rate
. Earlier estimates, such as those from the Voyager missions, suggested a day length of about 10.7 hours, but Cassini's data provided a more accurate and slightly shorter duration. Saturn's rapid rotation causes it to be noticeably oblate, meaning it is wider at the equator than at the poles
. In summary, a day on Saturn lasts just over 10 and a half hours, significantly shorter than an Earth day.
