📚 Learning Guide
Outer Solar System Features
hard

How did Neptune's migration influence the trajectory of icy bodies in the outer solar system?

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Choose the Best Answer

A

It caused them to form stable orbits around the Sun.

B

It flung many into highly elliptical and tilted orbits.

C

It had no significant effect on their trajectories.

D

It led to their complete destruction.

Understanding the Answer

Let's break down why this is correct

Answer

Neptune’s outward migration from its birth place to its present orbit tugged on nearby icy planetesimals, pulling them into resonant orbits and reshaping the Kuiper belt. As Neptune moved, its gravity captured many objects in mean‑motion resonances, such as Pluto’s 3:2 resonance, locking them into stable orbital ratios. The same gravitational nudges scattered some icy bodies inward, creating the scattered disk and supplying comets that later entered the inner solar system. This migration explains why the Kuiper belt has a sharp outer edge and a population of resonant objects. For instance, Pluto’s current 3:2 resonance orbit is a direct result of Neptune’s outward migration pulling it into a stable 3‑to‑2 orbital period ratio.

Detailed Explanation

When Neptune moved farther from the Sun, it tugged on nearby icy objects. Other options are incorrect because The idea that the icy bodies gained stable, neat orbits comes from thinking more gravity equals more order; Thinking Neptune had no effect is like ignoring the wind when throwing a ball.

Key Concepts

Neptune's migration
Icy bodies dynamics
Orbital mechanics
Topic

Outer Solar System Features

Difficulty

hard level question

Cognitive Level

understand

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