What is a trans-Neptunian object?
A) a solar system object that may impact Neptune in the next billion years
B) a moon of Neptune
C) a solar system object that orbits the Sun with a semimajor axis larger than Neptune's
D) an exoplanet roughly the same mass as Neptune

Question

Quizplus · Accepted Answer

Trans-Neptunian objects are celestial bodies in our solar system that orbit the Sun at a greater distance on average than Neptune, which means they have a semimajor axis larger than Neptune's.

What Is a Trans-Neptunian Object