If the Universe is infinitely large, infinitely old, and expanding, the night sky should be bright. But in fact, it is not. What do we call this?
A) the Cosmological Principle
B) Olbers' paradox
C) the Hubble Distance law
D) the Neutrino Discrepancy
E) Grand Unified Theory

Question

Quizplus · Accepted Answer

Olbers' paradox is the argument that if the universe were infinite, static, and filled with stars, the night sky would be bright because every line of sight would end on a star. The darkness of the night sky suggests that the universe is not infinite in age or static.

If the Universe Is Infinitely Large, Infinitely Old, and Expanding