An Astronomer Would Determine an Ecliptic Plane's Location on the Celestial

Multiple Choice

An astronomer would determine an ecliptic plane's location on the celestial sphere by

A) drawing a circle around the object to the surface of the Earth to determine the point where the circle pierces the sphere and represents the object's position.
B) drawing a line from the object to the center of the Earth to determine the point where the line pierces the sphere and represents the object's position.
C) using GPS technology to determine the point where the line pierces the sphere and represents the object's position.
D) drawing a line from the object to the center of the Earth.