Here's why:

* Faint rings: Neptune does have rings, but they are very faint and dusty compared to the more prominent rings of Saturn.

* Sometimes farthest from the sun: Neptune's orbit is slightly elliptical, meaning it's not perfectly circular. This means that for a short period of time, Pluto can actually be further from the Sun than Neptune. However, for the majority of its orbit, Neptune is the furthest planet from the sun.

Let me know if you have any other questions!