What is believed to be the reason for Earth's tilt relative to the plane of the ecliptic?
A) The gravitational pull of Mars.
B) The gravitational pull of the Sun.
C) The gravitational pull of Venus.
D) The collision with the Mars sized object called Theia about 4.5 billion years ago (which led to the formation of the Moon).

Question

Quizplus · Accepted Answer

The collision with a Mars-sized object called Theia is believed to have caused Earth's tilt and also led to the formation of the Moon.

What Is Believed to Be the Reason for Earth's Tilt