Why is the night sky is dark?
A) The universe has a physical edge, beyond which there is nothing.
B) The dust clouds in interstellar space block the light.
C) Dark matter obscures light from distant objects.
D) The universe is finite in age.

Question

Quizplus · Accepted Answer

The night sky is dark because the universe is finite in age, meaning it has not existed forever. This is related to Olbers' Paradox, which states that if the universe were infinite, eternal, and uniformly filled with stars, the night sky would be bright. However, because the universe has a finite age, light from distant stars has not had enough time to reach us, resulting in a dark night sky.

Why Is the Night Sky Is Dark