The ecliptic plane is defined by the motion of __________ in the sky.
A) the Moon
B) the Sun
C) Polaris
D) the stars

Question

Quizplus · Accepted Answer

The ecliptic plane is defined by the apparent path of the Sun across the sky as seen from Earth. It is the plane in which the orbits of the planets lie, and it is tilted relative to the celestial equator by about 23.5 degrees. The Moon's orbit is also tilted relative to the ecliptic plane by about 5 degrees. Polaris, also known as the North Star, is used as a point of reference for celestial navigation but does not play a role in defining the ecliptic plane. The stars are not involved in the definition of the ecliptic plane, but they do appear to move across it throughout the year as a result of Earth's orbit around the Sun.

The Ecliptic Plane Is Defined by the Motion of __________