Not so fast.
I *thought* Pluto had liquids on its surface. I double-checked and it turned out to be more of a quasi-solid liquid surface…more of a slurry.
Of course it is about 35 degrees Kelvin out there.
Nonetheless, it IS possible Pluto has a liquid surface. And yes, Pluto IS a planet.
And Titan. Maybe the no-doubt-highly-educated writer (or the editor, same prefix) of the piece meant to refer to liquid water?