How do you think, what kind of object the “heart” on the surface of Pluto?
Looks like methane ice or snow. It is polished and it doesn’t have any impact markers, so it is recent. Since Pluto has atmosphere and it has been theorized that it changes regularly due to the vast differences between the aphelion and the perihelion I think it could be that.
It can also be some cryovolcanism as in Triton, the Neptune biggest moon.

Of course it’s made of pure love!
Of course it’s made of pure love!
That’s the cutest thing i’ve ever seen all day.
Totally adorable!! :3