Correct Answer:
Option A - Triton is the largest of Neptune's 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit.Triton consists of a crust of frozen nitrogen over an icy mantle believed to cover a core of rock and metal. Triton's thin atmosphere is composed mainly of Nitrogen with small amounts of Methane.
A. Triton is the largest of Neptune's 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit.Triton consists of a crust of frozen nitrogen over an icy mantle believed to cover a core of rock and metal. Triton's thin atmosphere is composed mainly of Nitrogen with small amounts of Methane.