Titan
Titan is Saturn’s largest moon, it’s twice the size of our own. In this composite image you can see the Sun reflecting off its seas. It is the only object we have so far identified with stable liquid oceans.
Instead of liquid water it is thought to house liquid methane which moves across the surface in rivers and seas and, much like water on earth, it evaporates and rains down on the moon’s surface.
Don’t go planning a holiday just yet though, its surface temperature is around −179.2 °C.
