What is the dark energy?

dark energy is a very thin, uniform negative pressure that penetrates the entire observable universe. It represents 70% of the weight/energy in space and is responsible for its accelerating level of expansion. Dark energy is unlike the energy we are familiar with because it is not locally concentrated, as is the case with stars and galaxies, manifestations of conventional mass and energy. There are many other important differences between conventional energy and dark energy that they continue to explore physics.

The exact form or mechanism of dark energy operation is unknown. In this respect, it is similar to his cousin, a dark matter that can only be observed due to normal mass and energy.

There are two main theories for the form of dark energy, although one is more pronounced than the other. The first theory, quintessence , describes dark energy as a fluctuating field that changes its intensity based on the location.II as constant and uniform. Most physicists believe that this second theory and form the basis of the Lambda-CDM model, the prevailing model of the cosmos structure. The so -called virtual particles are continuously created and destroyed in this vacuum and create a quantum foam that has energy in itself.

The existence of dark energy has consequences for the final fate of the universe. If the dark energy is the inner feature of the space, as it looks, it will continue to exist indefinitely. If dark energy is the cause of the accelerating expansion of the universe, this will also cause the average density of any land to be a long -term point of view. As the universe grows increasingly, it will also cool down and hostile to life. Therefore, dark energy can rightly accused of the "heat death" of the universe.