How often do Saturn's rings disappear? What causes this to happen?
Saturn's rings change its angle with respect to earth observers in 14 years..It is called ring plane crossing.
So,once in 1 4 years they become very thin and observer will feel,it disappeared..Galileo observed the missing rings of Saturn.The same thing that's happening now: we're experiencing a "ring plane crossing." As Saturn goes around the sun, it periodically turns its rings edge-on to Earth—once every 14-to-15 years. Because the rings are so thin, they can actually disappear when viewed through a small telescope. Beta/NASA Picture canadinword press.com.