Triton one of neptunes many moons is distinguished in part by the fact that it has a retrograde orbit is the only major moon in the solar system with this type of orbit what does this tell scientist about triton

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. Scientists think Triton is a Kuiper Belt Object captured by Neptune's gravity millions of years ago.