Titan is moving away from Saturn about 11 centimetres every year — roughly 100 times faster than scientists once believed — suggesting the moon may have begun its life much closer to the planet

Titan is retreating almost three times faster despite orbiting much farther from its planet than our Moon does from Earth. Saturn’s rotation gives Titan orbital energyThe basic reason moons migrate outward is familiar from the Earth-Moon system. A forward pull gives the moon orbital energy and angular momentum, lifting it into a slightly larger orbit. The new result implied a Saturnian Q near 100 at Titan’s tidal frequency, more than 100 times lower than many earlier expectations. What I find most interesting is that the changing object is not only Titan’s orbit.