Why are the rings of Neptune dark?
A) The small,icy grains of which they are made are transparent and reflect little light back toward Earth.
B) There are so few of them,making the rings dark even though the individual icy ring particles have high reflectivities.
C) The ice from which they are made is coated with dark space dust.
D) The ring material,methane ice,has been darkened by impact by electrons from the magnetosphere.

Question

Quizplus · Accepted Answer

The rings of Neptune are made up of methane ice particles that have been darkened by constant bombardment of electrons from the planet's magnetosphere. This makes the rings much darker than would be expected from their composition alone.

Why Are the Rings of Neptune Dark