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Answer:   Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart.

Explanation:

Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart.

The event that the faster expansion rate is due to a  dark force that is pulling galaxies apart.

What is universe?

Universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, the stars along with the ,dust , gases, rocks forms the universe.

The big bang is the theory which explains that how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.

The universe consist of fully dark matter, interstellar gases or dust. The big bang is increasing just because in universe there is abundant of hydrogen and helium.

The radiations come from the big bang. These rays are also called as cosmic wave. This universe is  still on it way of expanding more.

Thus, the faster expansion rate is due to a  dark force  pulling the galaxies apart.

Learn more about universe.

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