Dark stuff

What is or is not dark stuff in all its non being of darkness? Dark energy, dark matter, dark antimatter ...

It's embarrassing, but astrophysicists are the first to admit it. Our best theoretical model can only explain 5% of the universe. The remaining 95% is famously made up almost entirely of invisible, unknown material dubbed dark energy and dark matter.
Bizarre 'dark fluid' with negative mass could dominate the universe | phys.org

Since its discovery at the end of last century, dark energy has been a riddle wrapped in an enigma. We are all desperate to gain some greater insight into its characteristics and origin. Such work helps us make progress in solving this 21st Century mystery.
Astronomers reveal evidence of dynamical dark energy | Science Daily

dark energy matter latest news articles posts research

It's a beautiful theory: the standard model of cosmology describes the universe using just six parameters. But it is also strange. The model predicts that dark matter and dark energy – two mysterious entities that have never been detected—make up 95% of the universe, leaving only 5% composed of the ordinary matter so essential to our existence.
The dark side of cosmology | phys.org

What Is Dark Energy? More is unknown than is known. We know how much dark energy there is because we know how it affects the Universe's expansion. Other than that, it is a complete mystery. But it is an important mystery. It turns out that roughly 68% of the Universe is dark energy. Dark matter makes up about 27%. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter - adds up to less than 5% of the Universe. Come to think of it, maybe it shouldn't be called "normal" matter at all, since it is such a small fraction of the Universe...

We are much more certain what dark matter is not than we are what it is.
Dark Energy, Dark Matter | NASA

Physicists theorized the existence of invisible, and so far undetectable, dark matter as a way to explain why galaxies and celestial bodies don't just unravel and fly apart. All matter creates its own gravitational force, but according to calculations, visible matter doesn't have nearly enough gravity to hold the universe together. Physicists estimate that there must be about five times as much dark matter as there is visible matter in order to hold the universe together.

But physicists don't know what dark matter is made of, or how to detect it directly.
Hints of Mysterious Dark Matter Revealed by Cosmic Rays | Live Science

This could be the first experimental evidence that dark matter is indeed made of WIMPS. The best explanation for the dark-matter cloud’s offset, says Massey, is that it’s passing through other dark-matter clouds in the core of Abell 3827. Friction between the clouds, caused by this extra force, is forcing the one Massey observed to lag behind its galaxy—although Massey and his colleagues have no idea yet what the force is. An extra force besides gravity wouldn’t make dark matter less dark in the sense of being easier to see directly, but rather in the sense of casting some light on its nature.

They’re also open to the possibility that something much more mundane is going on. A burst of star formation on one side of the visible galaxy, for example, could create a bright spot that could skew the astronomers’ estimate of where the galaxy’s center is. Or perhaps the gravity of nearby galaxies, might be distorting the visible galaxy’s shape, again making its center hard to pinpoint. “It’s tough to think of a convincing alternative explanation,” Massey says, “but this is such an exciting discovery that I’m being extra super cautious rather than shouting from the rooftops.”

The idea that dark-matter particles are slowing each other down through some unknown force “does seem like the most likely explanation at this point,” says Jason Rhodes, a dark-matter expert at NASA’s Jet Propulsion Laboratory. “But we clearly need more evidence.”
Dark Matter May Be Less Mysterious Than We Thought | National Geographic

Like other galaxies, the Milky Way is thought to be enveloped in a bubble of dark matter.
Galactic X-rays could point to dark matter proof | BBC

dark diagram stuff ratio energy matter

The good thing about Dark stuff is that it either is or is not. So it will debunk the Electric Universe Theory or provide evidence for EU Theories.

What is Dark stuff? Explained.

Scientists reckon that dark matter makes up more than 80% of all the mass in the Universe. As its name suggests, it gives off no light, but reveals its presence through the gravitational tug it exerts on stars within galaxies.

However, we still have little idea about what dark matter actually is.
Galactic X-rays could point to dark matter proof | BBC

Dark matter, once the stuff of science fiction, "is one of the most important mysteries of physics today," Ting, a professor at the Massachusetts Institute of Technology and 1976 Nobel physics prize winner, has written.

Sometimes called the sculptor of the universe's millions of galaxies because of the way its gravity shapes their formation, its existence has long been recognized because of the way it pushes visible stars and planets around.

But efforts in laboratories on earth and in deep underground caverns to find concrete evidence that it is there, and to establish what it is, have so far proven fruitless.
Scientists home in on mysterious dark matter | Reuters

One exciting explanation for this is if the hydrogen atoms in the early cosmos had some direct interaction with so-called dark matter.

This unseen "stuff" is postulated to exist because of the way its gravitational influence is seen to affect the rotation of galaxies. But its substance is unknown because no other type of interaction has yet been observed.
Signal detected from 'cosmic dawn' | BBC

Dark stuff news

Dark matter becomes less 'ghostly'
Physicists show that Higgs boson explains lack of antimatter in the universe

Until last week, dark matter was thought to make up around 24 percent of the universe, with normal matter - galaxies, stars and planets - accounting for about 4.5 percent.

But then the European Space Agency's Planck satellite team reported that mapping of echoes of the early cosmos showed dark matter made up 26.8 percent and ordinary matter 4.9 percent - together the total of the material of the universe.

The dominant constituent is the non-material "dark energy", as mysterious as dark matter and believed to be the driver of cosmic expansion.
Scientists home in on mysterious dark matter | Reuters

The mysterious stuff known as dark matter just became less ghostly. It makes up 85% of the total matter in the cosmos and comprises some 27% of the known Universe.

For the first time, the enigmatic quantity may have been caught interacting with other dark matter in a cluster 1.4 billion light-years away. Previous studies of colliding galaxy clusters have shown that dark matter barely interacts with anything. And the finding, published in Monthly Notices of the Royal Astronomical Society, may hint at exotic physics - beyond the scope of current theories.

According to widely accepted ideas, the visible matter in galaxies exists inside clumps of dark matter. Without dark matter's gravity to stabilise them, galaxies like the Milky Way would tear themselves apart as they spin. Yet despite its all-importance, dark matter's true nature remains elusive. It has been shown only to interact with the fundamental force of gravity.

And while it is widely believed to be associated with a specific particle, the current theory of physics known as the Standard Model does not account for one.

Dark matter becomes less 'ghostly'

Dark matter or just an Electric Universe?

Under particular conditions, the experimental plasma spirals rotate as rigid bodies or are stationary with respect to the experimental apparatus and appear to be persistent. However, the velocity distribution for particles in the arms is not known. We suggest that an experimental determination of particle velocity distribution be made to compare with that of spiral galaxies. Because galaxies are composed largely of plasma, the assumption of dark matter should not be accepted by default without testing whether a plasma mechanism arising from electromagnetic effects could also be a possible explanation for the observed anomalies. If both the morphology and particle velocity distribution of spiral arms can be reproduced experimentally and mathematically, the need to postulate the existence of dark matter, which cannot be detected directly, would be obviated.
The Plasma Plus Gravity Universe May Not Need Dark Matter | Institute of Electrical and Electronics Engineers

Dark and mysterious things expanding the universe

The disagreement with Dr Riess's number is more than just a minor inconvenience. When using the Hubble Constant to calculate the time from the Big Bang, the offset equates to a difference of a few hundred million years in the near-14-billion-year age of the Universe.

The STScI scientist says the resolution is likely to be found in a better understanding of the "dark" components of the cosmos.

These include the unseen matter in galaxies (dark matter), and the vacuum energy (dark energy) postulated to be driving an acceleration in the expansion.

The gap could also be plugged by the existence of another, but hitherto undetected, particle.

The often-hypothesised fourth type, or flavour, of neutrino would fit the bill.

"This would change the balance of energy in the Universe and it would speed it up," Dr Riess said.
Hubble clocks faster cosmic expansion | BBC