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We know how much dark energy there is because we know how it affects the universe's expansion.
According to Wikipedia, dark energy refers to an unknown form of energy, which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
Although we don't know what dark energy is, one idea is that it's an energy inherent to space itself.
Together, dark matter and dark energy make up some 95 percent of our universe, scientists suspect, but astrophysicists know of dark matter and dark energy's existence only indirectly, by their influence on the stars and galaxies that light up the sky.
Recently, a different proposal has attracted considerable attention, a model which has its roots on the Veneziano ghost of QCD [8, 9, 10, 11] and is known as QCD ghost dark energy [12].
This mission uniquely combines the ability to discover and characterize planets beyond our own solar system with the sensitivity and optics to look wide and deep into the universe in a quest to unravel the mysteries of dark energy and dark matter.
30 in Physics Review Letters journal, cosmologists from the Universities of Portsmouth and Rome posited that traces of dark matter in the universe, which said to be the "cosmic scaffolding" supporting the universe, is being swallowed up by dark energy.
Researchers from the universities of Portsmouth and Rome have found indications that dark matter, the cosmic scaffolding on which the universe is built, is being slowly erased by dark energy.
crit] are, respectively, the cosmological matter and dark energy density parameters.
The Dark Sector is made up of Dark Matter and Dark Energy.
A University of Cyprus project on the effects of Dark Matter and Dark Energy on gravitational theory has won a 1.
Dark Universe" whisks audiences out of the Milky Way galaxy, drops them alongside a parachute descending through Jupiter's atmosphere, and brings them all the way to the afterglow of the Big Bang, while revealing the breakthroughs that have led astronomers to confront two g great cosmic mysteries: dark n matter and dark energy