Which of the following is not consistent with observations of the cosmic microwave background?
A)The universe is at least 20 billion years old.
B)The universe is geometrically "flat" (in the four dimensions of spacetime).
C)The matter density (both luminous and dark matter combined)in the universe is only about one- fourth of the critical density.
D)Dark energy, whatever it is, represents the majority of the energy content of the universe.

Question

Quizplus · Accepted Answer

The current age of the universe is estimated to be around 13.8 billion years based on observations of the cosmic microwave background, so option A is not consistent with those observations.

Which of the Following Is Not Consistent with Observations of the Cosmic