Question

Why the universe is dark ??​

Answer 1

Explanation:

In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales

Answer 2

Answer:

Even so, astronomers know that they take gravity for granted at their own peril. They have inferred the existence of dark matter due to its gravitational effects on galaxies, and the existence of dark energy due to its anti-gravitational effects on the expansion of the universe.