Why are the rings of Neptune dark?
A) Although the particles have highly reflective surfaces, there are very few particles in the rings.
B) The rings are composed of small, dark rock particles.
C) The particles are composed of methane ice that has been darkened by radiation damage.
D) The particles have highly reflective surfaces, but the rings are far from the Sun, where there is little light.

Question

Quizplus · Accepted Answer

The rings of Neptune are dark because the particles, which are composed of methane ice, have been darkened by radiation damage. This process alters the chemical composition of the methane ice, reducing its reflectivity and giving the rings their dark appearance.

Why Are the Rings of Neptune Dark