What is so unusual about Pluto's orbit?
A)It lies exactly on the ecliptic.
B)It has the lowest eccentricity of any planet's orbit.
C)It is more inclined to the ecliptic than any of the eight planets.
D)It has an unexpectedly short orbital period.
E)It's orbital period is exactly twice that of Neptune's.

Question

Quizplus · Accepted Answer

Pluto's orbit is tilted at an angle of about 17 degrees to the ecliptic, which is significantly more inclined than the other eight planets in the solar system. Pluto's orbit is more inclined to the ecliptic than any of the eight planets. Its orbital inclination is about 17 degrees, while the other planets have inclinations of less than 7 degrees. This is one of the reasons why Pluto was reclassified as a "dwarf planet" in 2006, since it did not fit the traditional definition of a planet that requires it to have "cleared its orbit" of any other objects.

What Is So Unusual About Pluto's Orbit