The first satellite discovered in orbit about Pluto was Charon. What is unusual about this moon?
A) Charon is the only moon in the solar system known to have an atmosphere.
B) Charon is much warmer than it should be, given its position in the solar system.
C) Compared with planet-satellite systems in the rest of the solar system, Charon is very large and very close to Pluto.
D) Charon is geologically active.

Question

Quizplus · Accepted Answer

Charon is unusually large relative to Pluto, making the Pluto-Charon system more like a double dwarf planet system than a typical planet-moon system. Charon's size and proximity to Pluto are distinctive compared to other known moons in relation to their planets in the solar system.

The First Satellite Discovered in Orbit About Pluto Was Charon