APOD 4.1 (It's Raining on Titan)

I chose this picture because Titan is the only object other than Earth that has shown evidence of stable bodies of surface liquids.  The only difference is that, while Earth's stable liquid is water, Titan's temperatures around -290 degrees Celsius mean that the processes of evaporation,, cloud formation, and rain are applied to liquid methane.  While this might mean we would have to look elsewhere for a second Earth, it does prove that Earth's water cycle could happen elsewhere naturally, making our hopes of finding a home after Earth much more likely.