Researchers have uncovered new insights into Saturn’s largest moon, Titan, including its origin and unusual behavior.

Titan, larger than Mercury and massive enough to affect Saturn’s tilt, is drifting away from the planet at 11 centimeters per year, faster than previously thought.

New research combining Cassini data, simulations, and formation theories suggests Titan merged with a lost moon about half a billion years ago.

This collision may have created Hyperion, Saturn’s largest nonspherical moon, either directly or from resulting debris, CNN has reported.

The event could also have triggered collisions among Saturn’s inner moons, ultimately leading to the formation of its iconic rings.