Why do astronomers believe that Triton is a captured moon?
A)Triton orbits Neptune in a direction opposite that of Neptune's rotation.
B)Triton is very small and potato-shaped,which is common of captured moons.
C)Triton is too large to have been formed in the "miniature solar nebula" thought to have surrounded Neptune in its very early history.
D)Triton appears to be made mostly of ice.

Question

Quizplus · Accepted Answer

Astronomers believe that Triton is a captured moon because it orbits Neptune in a direction opposite that of Neptune's rotation. This is a strong indication that it did not form with Neptune but was instead captured by Neptune's gravity.

Why Do Astronomers Believe That Triton Is a Captured Moon