Which observation supports the theory that the planets formed from a disk shaped nebula?
A)Pluto and comets follow elliptical orbits that pass inside the orbit of Neptune.
B)The Sun is the center of the solar system.
C)The rocky planets are close to the Sun.
D)The planets revolve around the Sun in approximately the same plane of the ecliptic.

Question

Quizplus · Accepted Answer

The fact that the planets revolve around the Sun in approximately the same plane of the ecliptic supports the theory that the planets formed from a disk shaped nebula. This is because the nebula would have had a flattened, disk-like shape, and the planets would have formed from the material in this disk. The alignment of their orbits indicates that they all formed from the same plane of material.

Which Observation Supports the Theory That the Planets Formed from a Disk