Saturn's largest moon, Titan, may be made of two different moons that smashed together hundreds of millions of years ago, a new study suggests. If confirmed, this epic collision could also help to solve several long-standing mysteries surrounding the gas giant, including how its iconic rings formed.
Titan is the solar system's second-largest moon, behind Jupiter's Ganymede. It is around 3,200 miles (5,150 kilometers) across, which is roughly 1.5 times wider than Earth's moon and around 5% wider than Mercury.
