Question

What is unusual about Pluto's moon?

Answer 1

Pluto is much smaller to be refereed as a planet

Answer 2

In order of distance from Pluto, they are Charon, Styx, Nix, Kerberos, and Hydra. Charon, the largest of the fivemoons, is mutually tidally locked withPluto, and is massive enough thatPluto–Charon is sometimes considered a double dwarf planet.