Which is evidence for the existence of dark energy?
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1 point
galaxies that are rotating at a constant rate
Pulsars that seem to be moving closer at an accelerating rate
Black holes that are expanding at a constant rate
Supernovae that are moving away at an accelerating rate
Supernovae that are moving away at an accelerating rate is evidence for the existence of dark energy.
The evidence for the existence of dark energy is supernovae that are moving away at an accelerating rate.
The evidence for the existence of dark energy lies in the observation of supernovae that are moving away at an accelerating rate. This observation, known as the accelerating expansion of the universe, was made in the late 1990s and has been confirmed by multiple independent studies.
To get this answer, you can start by understanding the concept of dark energy. Dark energy is a hypothetical form of energy that is thought to permeate all of space and is responsible for the acceleration of the expansion of the universe. It is considered as a possible explanation for the observations made by astronomers.
To find the evidence, you need to look for observations that support the concept of accelerating expansion. One such observation is the study of supernovae, which are extremely bright explosions of stars. By measuring the distances and redshifts of these supernovae, astronomers have found that they are moving away from us at an accelerating rate. This implies that there must be a source of energy driving this accelerated expansion, and dark energy is one of the leading hypotheses to explain it.
Therefore, the correct answer is:
Supernovae that are moving away at an accelerating rate.