What type of energy is dark energy?
Dark Energy is a hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity. It has been hypothesised to account for the observational properties of distant type Ia supernovae, which show the universe going through an accelerated period of expansion.
Why do we think dark energy exist?
Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space. As a result, this form of energy would cause the universe to expand faster and faster.
Does dark energy really exist?
Dark energy, and its cousin dark matter, are not showing up in any empirical tests. This is big. Secular cosmologists have been teaching for nearly two decades that “dark energy” makes up 68\% of the universe, and dark matter another 28\%, leaving only 4 or 5 percent as normal matter.
What are the theories of dark matter and dark energy?
Interacting dark energy. Another class of theories that unifies dark matter and dark energy are suggested to be covariant theories of modified gravities. These theories alter the dynamics of the space-time such that the modified dynamic stems what have been assigned to the presence of dark energy and dark matter.
Is there a relation between dark energy and inflation?
However, inflation must have occurred at a much higher energy density than the dark energy we observe today and is thought to have completely ended when the universe was just a fraction of a second old. It is unclear what relation, if any, exists between dark energy and inflation.
Does general relativity eliminate the need for dark energy?
The evidence for dark energy is heavily dependent on the theory of general relativity. Therefore, it is conceivable that a modification to general relativity also eliminates the need for dark energy. There are very many such theories, and research is ongoing.