What Is the Celestial Sphere

Multiple Choice

What is the celestial sphere?

A) The celestial sphere is a model of how the stars are arranged in the sky relative to our Sun, which is in the middle of the sphere.
B) It represents a belief in an Earth- centered universe, and hence is no longer considered to have any use.
C) The celestial sphere is a representation of how the entire sky looks as seen from Earth.
D) The celestial sphere is a model that shows the true locations in space of the Sun and a few thousand of the nearest stars.