What is the primary reason that astronomers suspect that some jovian moons were captured into their current orbits?
A)Some moons have a composition that differs from the composition of the planets.
B)Astronomers have observed moons being captured.
C)Some moons are surprisingly large in size.
D)Some moons have orbits that are "backwards" (compared to their planet's rotation)or highly inclined to their planet's equator.

Question

Quizplus · Accepted Answer

Moons with "backwards" or highly inclined orbits are unlikely to have formed in orbit around their planet, leading astronomers to suspect that they were captured from elsewhere in the Solar System.

What Is the Primary Reason That Astronomers Suspect That Some