QUESTION: How long is a Saturnian year? ANSWER from FAQ on June 11, 1999: A year is defined as the time it takes for Earth to make one complete trip around the Sun (365 days). It takes Saturn 29.5 Earth years to travel once around the Sun. So one Saturn year is about 30 Earth years. If you were10 Earth years old, you would only be 10/30 = 1/3 = 0.33 of a Saturn year old. Saturn would only have had time to go a third of its way around the Sun since you were born.