Which of the following statements best explains why the planets orbit in nearly a single plane and in the same direction around the Sun?
A) The planets formed from a disk of rotating gas.
B) The Sun rotates in the same direction, and spun out the planets as it formed.
C) The planets all rotate in same direction as they orbit.
D) It's a mysterious coincidence: the planets form randomly, so it's a puzzle how they orbit that way.

Question

Quizplus · Accepted Answer

The planets orbit in nearly a single plane and in the same direction around the Sun because they formed from a disk of rotating gas, called the protoplanetary disk, around the young Sun. This disk was flattened and slowly rotated, causing the planets to form in nearly the same plane and in the same direction of rotation.

Which of the Following Statements Best Explains Why the Planets