According to the Cosmological Principle, the universe
A) has no beginning and no end
B) cannot be understood by the use of scientific observations alone
C) is isotropic and homogeneous
D) consists only of galaxies that are exactly like the Milky Way
E) has all the galaxies arranged in groups about the size of our Local Group

Question

Quizplus · Accepted Answer

The Cosmological Principle states that the universe is isotropic (looks the same in all directions) and homogeneous (looks the same at all locations). This is supported by observations of the cosmic microwave background radiation, which is nearly uniform in all directions.

According to the Cosmological Principle, the Universe