What is dark energy?
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Dark energy is a hypothetical form of energy that we still know very little about, and is a relatively new discovery. Dark energy help to explain many of the phenomena observed in the universe, such as the large-scale structures and arrangements of galactic clusters. It is said to permeate all of space and tends to accelerate the expasion of the universe because of its strong negative pressure. It is also thought to be repulsive of gravity.
Of course, dark energy cannot be directly measured or observed and its existence is only extrapolated from observable phenomena. It is not known to interact through any of the fundamental forces other than gravity. Based on the standard model of cosmology it is supposed to account for 74% of the total mass-energy of the universe.
Of course, dark energy cannot be directly measured or observed and its existence is only extrapolated from observable phenomena. It is not known to interact through any of the fundamental forces other than gravity. Based on the standard model of cosmology it is supposed to account for 74% of the total mass-energy of the universe.
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Dark energy is the name given to the force that is believed to be making the universe larger. Distant galaxies appear to be moving away from us at high speed: the idea is that the universe is getting bigger and has been since the Big Bang.
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