In 1998, scientists discovered that the expansion of the universe has been accelerating. what force is causing this phenomena? dark energy hubble’s law the doppler effect background radiation

The answer is Dark Energy. It is a mysterious force that seems to counteract gravity. While cosmologists had expected that the universe would be slowing in its expansion due the force of gravity, the universe was discovered to be actually accelerating (observed through a technique called Doppler shift effect by the Hubble Telescope). Dark energy is responsible for this acceleration in universe expansion.

The Dark energy concept is a scientific conjecture used to explain the accelerated  expansion of the universe. The correct option is A). Dark energy.

Dark energy is a scientific conjecture used to explain the accelerated expansion of the universe.

This force is believed to

At the present, there is no evidence of its existence or any clues of how to look for it. However, it is known that it is different from dark matter.

The correct answer is A. The force is causing this phenomena is dark energy.

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