The cause could be the existence of another, unknown particle — perhaps an often - hypothesized fourth flavor of neutrino — or that the influence of dark energy (
which accelerates the expansion of the universe) has increased over the 13.8 billion year history of the universe.
Not exact matches
[5][6] The theory could potentially explain why a mysterious repulsive form
of energy known as the «cosmological constant», and
which is
accelerating the
expansion of the
universe, is several orders
of magnitude smaller than predicted by the standard Big Bang model.»
It is believed that vacuum fluctuations may have a connection with «dark energy»
which drives the
accelerated expansion of the
universe.
It does not explain the perplexing phenomenon
of dark energy,
which is
accelerating the
expansion of the
universe, nor does it account for dark matter, the invisible material that outweighs visible galaxies five to one.
Such extra dimensions might explain some conundrums in physics, such as the existence
of dark matter (an as - yet - unidentified source
of mass in the
universe) and dark energy (
which causes the
universe's
expansion rate to
accelerate), says coauthor Daniel Holz, an astrophysicist at the University
of Chicago.
Dark energy, thought to explain the
accelerating expansion of the
universe, exerts negative pressure,
which suggests it might have negative temperature — Schneider is currently discussing the idea with cosmologists.
AN OPTICAL illusion has enabled the most precise measurement yet
of the abundance
of the mysterious dark energy,
which is thought to be
accelerating the
universe's
expansion.
One
of them accounts for so - called dark energy,
which comprises about 70 per cent
of the total energy
of the
universe and is responsible for its
accelerated expansion.
For decades, scientists had been trying to link mainstream physics» understanding
of viscosity with a related concept: cosmic viscosity,
which tells us about the
universe's resistance to
accelerating expansion.
More recently, Verlinde suggested an alternative called «emergent gravity,» in
which gravity is a byproduct
of quantum fluctuations and dark energy (another scarcely understood phenomenon, one that seems to be causing the
universe's
expansion to
accelerate).
But it could also describe last year's Nobel Prize in Physics, for
which three researchers representing two teams totaling 51 scientists were recognized for uncovering the
accelerating expansion of the
universe.
The largest map
of dark matter ever made (pictured) is one
of several new ones that will help to nail the properties
of the equally mysterious dark energy,
which is thought to drive the
universe's
accelerating expansion.
And, you know, one
of the best ways to track dark energy,
which is the force that's causing the
expansion of the
universe to
accelerate, is to see how far spread apart things are in the distant
universe, to see how fast the
universe is pulling apart.
The frequency
of gravitational lensing,
which can be measured by counting the number
of gravitationally lensed quasars within a given quasar catalog, allows one to infer the
expansion speed
of the
universe, because the
accelerated expansion increases the distance to each quasar and therefore enhances the chance
of gravitational lensing (Figure 2).
ML: What we know is that dark energy,
which was discovered in 1998, seems to be responsible for the present
accelerating expansion of the
universe.
Dark energy,
which is driving the
accelerating expansion of the
universe, is one
of the biggest mysteries in physics.