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Archive for the ‘cosmology’ category

Jan 28, 2023

Astronomers inspect a powerful radio-loud high-redshift quasar

Posted by in categories: cosmology, evolution

Using the European VLBI Network (EVN), an international team of astronomers has performed high-resolution imaging observations of a powerful and radio-loud high-redshift quasar known as J2102+6015. Results of the observational campaign, presented January 18 on the preprint server arXiv, could help us better understand the nature of this peculiar quasar and other powerful radio sources.

Quasars, or quasi-stellar objects (QSOs), are extremely luminous active galactic nuclei (AGN) containing supermassive central black holes with accretion disks. Their redshifts are measured from the strong spectral lines that dominate their visible and .

Astronomers are especially interested in finding new (at redshift higher than 4.5) as they are the most luminous and most distant compact objects in the observable universe. Spectra of such QSOs can be used to estimate the mass of supermassive black holes that constrain the evolution and formation models of quasars. Therefore, high-redshift quasars could serve as a powerful tool to probe the .

Jan 28, 2023

Our Universe is normal! Its biggest anomaly, the CMB cold spot, is now explained

Posted by in category: cosmology

The Universe is supposed to be the same everywhere and in all directions. So what’s that giant “cold spot” doing out there?

Jan 28, 2023

The Fifth Dimension’s Portal Has Been Found, According to Scientists — archeology and animals Blog

Posted by in categories: cosmology, particle physics

In a new study, scientists say that a particle that links to a fifth dimension can explain dark matter.

The “warped extra dimension” (WED) is a trademark of a popular physics model that was first introduced in 1999. This research, which was published in The European Physical Journal C, is the first to use the theory to explain the long-standing dark matter problem in particle physics. Gravity portals' could morph dark matter into ordinary matter, astrophysicists propose | Live Science

The idea of dark matter, which makes up most of the matter in the universe, is the basis for what we know about how the universe works. Dark matter is like a pinch-hitter that helps scientists figure out how gravity works. Without a “x factor” of dark matter, many things would dissolve or fall apart. Even so, dark matter doesn’t change the particles we can see and “feel,” so it must have other special qualities as well.

Continue reading “The Fifth Dimension’s Portal Has Been Found, According to Scientists — archeology and animals Blog” »

Jan 27, 2023

Cybernetic Theory: The Code of Reality & Our Future as Cybergods | Talk

Posted by in categories: cosmology, existential risks, physics, robotics/AI, singularity, transhumanism, virtual reality

CYBERNETIC THEORY: THE CODE OF REALITY & OUR FUTURE AS CYBERGODS: presenting my published works in a recent talk. Topics include evolutionary cybernetics, computational physics, consciousness, philosophy of mind, cybernetic theory, Omega Point cosmology, physics of time, simulation theory, Global Mind, AGI, VR, Metaverse, Cybernetic Singularity, transhumanism, posthumanism, cybernetic immortality, synthetic telepathy, mind-uploading, neurotechnologies, Fermi Paradox, Dark Matter, Dark Energy, the Argument for Cybertheism, and more.

The main 45-minute slide presentation is followed by a 15-minute Q&A session. This presentation is in Russian with slides and subtitles in English.

Continue reading “Cybernetic Theory: The Code of Reality & Our Future as Cybergods | Talk” »

Jan 26, 2023

She Turns Fluids Into ‘Black Holes’ and ‘Inflating Universes’

Posted by in category: cosmology

By using fluids to model inaccessible realms of the cosmos, Silke Weinfurtner is “looking for a deeper truth beyond one system.” But what can such experiments teach us?

Jan 26, 2023

Neil Turok on the case for a parallel universe going backwards in time

Posted by in category: cosmology

To explain the cosmos without invoking cosmic inflation, physicist Neil Turok has proposed the existence of a mirror-image universe going backwards in time from the big bang. He tells us why the idea is so compelling.

Jan 26, 2023

Green comet’s new “anti-tail” seemingly breaks the laws of physics

Posted by in categories: cosmology, physics

Astrophotographers spotted what looks like a third tail flowing in front of, instead of behind, the glowing comet.

The green comet C/2022 E3 (ZTF), which last flew by Earth 50,000 years ago when Neanderthals still coexisted with humans, has been gradually making its way across the night sky over the last few days.

What’s more, as per a LiveScience report, this “anti-tail” appears to be flowing in the wrong direction and is, therefore, seemingly breaking the laws of physics.

Continue reading “Green comet’s new ‘anti-tail’ seemingly breaks the laws of physics” »

Jan 26, 2023

Three mind-blowing space mysteries that could be solved in next decade — including what lies beneath the Earth’s crust

Posted by in category: cosmology

AS technology advances rapidly, we’re getting closer to cracking space mysteries that once baffled scientists.

Some experts think we could solve mysteries like dark matter in the next decade.

We’ve rounded up some of the biggest space mysteries that scientists are hoping to solve in our life times.

Continue reading “Three mind-blowing space mysteries that could be solved in next decade — including what lies beneath the Earth’s crust” »

Jan 26, 2023

A new approach to solving the mystery of dark energy

Posted by in categories: cosmology, particle physics, quantum physics

What is behind dark energy—and what connects it to the cosmological constant introduced by Albert Einstein? Two physicists from the University of Luxembourg point the way to answering these open questions of physics.

The universe has a number of bizarre properties that are difficult to understand with everyday experience. For example, the matter we know, consisting of atoms and molecules and other particles, apparently makes up only a small part of the energy density of the universe. The largest contribution, more than two-thirds, comes from “”—a hypothetical form of energy whose background physicists are still puzzling over.

Moreover, the universe is not only expanding steadily, but also doing so at an ever-faster pace. Both characteristics seem to be connected, because dark energy is also considered a driver of accelerated expansion. Moreover, it could reunite two powerful physical schools of thought: and the developed by Albert Einstein. But there is a catch: calculations and observations have so far been far from matching. Now two researchers from Luxembourg have shown a way to solve this 100-year-old riddle in a paper published by Physical Review Letters.

Jan 25, 2023

Study demonstrates a new method to search for meV dark photons

Posted by in categories: cosmology, particle physics

Approximately 85% of the mass of our galaxy is comprised by dark matter, matter that does not emit, absorb or reflect light and thus cannot be directly observed. While several studies have hinted at or theorized about its composition, it remains one of the greatest unresolved physics problems.

Physicists all over the world have been conducting dark matter searches or trying to come up with new methods to directly observe different dark matter candidates. One hypothetical form of dark matter that has so far eluded detection is dark-photon dark matter.

An intriguing possibility is that dark matter is comprised of dark photons, which resemble photons (i.e., the particles that make up visible light), but interact with charges with feeble strength. These dark photons could theoretically have masses in the milli-electrovolt range, approximately a million times lighter than those of electrons and thus notoriously difficult to detect.

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