Chapter 34, Problem 2TE

To determine

The reason of darkness in the night sky.

Answer to Problem 2TE

The idea of a finite universe explains why the Earth's sky is dark at night and we can see so much darkness in the clear night sky

Explanation of Solution

According to the paradox statement, stars emit their own light, but the dust clouds between the stars absorb this light, and we see so much darkness in the sky. This statement is not correct with itself because if dust particles that are present in the galaxy absorb the light of a star, then they would also shine like a star, but it did not happen.

Later the scientists discovered the concept of a finite universe, which means there is finite space for trillions of star to light up. Stars are very far from each other, so the universe wouldn't have enough stars to light up all of space.

Conclusion:

Therefore, the idea of a finite universe explains why the Earth's sky is dark at night and we can see so much darkness in the clear night sky.