What is dark energy that makes up 69% of the universe?

By comparing the number of galaxies and the cluster mass, the researchers calculated the proportions of matter and energy. Slate reports. From this observation, they ran simulations of the generation of clusters of galaxies, with varying proportions of dark energy and matter. The simulations closest to the observed clusters of galaxies in the universe were made up of 31% matter, or 69% dark energy.

What is dark energy?

A great secret of the universe. It is often summarized in this way as its nature remains to be determined. Scientists aren’t sure what it is, but they are sure it makes up most of the density in the universe. In cosmology, dark energy is a hypothetical form of energy that is uniformly filled with energy.

Not to be confused with dark matter, which normally interacts with gravity, dark energy has a negative pressure and behaves like a repulsive gravitational force. Thus, due to its repulsive property, dark energy has the potential to accelerate the expansion of the universe rather than slow it down, as would be expected in a matter-dominated universe.

If dark energy continues to dominate the composition of the universe, the expansion of space will accelerate until it reaches exponential expansion. In other words, structures not yet gravitationally bound will fall apart, with parts moving away from each other at speeds faster than the speed of light. This acceleration would also render large parts of the universe invisible to observation.