Question

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

Answer 1

Answer:

Explanation:

The universe is expanding — and it is doing so at the same rate in all directions, according to new measurements that appear to confirm the standard model of cosmology.

Astrophysicist Jeremy Darling of the University of Colorado Boulder came to this conclusion after employing a research strategy known as "real-time cosmology," which seeks out the tiny changes in the universe that occur over human timescales.

Answer 2

dark energy is causing this phenomena because scientist don't know about how the universe is expanding it is said to be that it is an unknown force that which cannot be defined it also states that there if normal matter come in contact with dark matter it will create a explosion .