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Category: cosmology – Page 2

Compactification of dimensions in string theory and inflationary expansion of space from Planck scale.

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Physicists have come up with a new idea for how our universe began, and it could also explain dark matter. They say that if our universe has small extra dimensions, then these can temporarily store energy, causing a “cosmological stasis” in which the universe expands but nothing else happens. Then the stasis ends and dark matter remains. Sounds wild. What are we to make of this?

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Continue reading ““Cosmological Stasis” Could Explain Dark Matter: Does that make sense?” | >

Could gravitational waves—the ripples in space-time—also be quantum in nature? Scientists believe they might! A new study suggests gravitational waves could induce quantum entanglement, revolutionizing physics and reshaping our understanding of gravity. But detecting these effects requires cutting-edge technology. Will future observatories like LIGO-India unlock the quantum secrets of space-time? Dive into this fascinating discovery and explore the possibilities of a quantum universe! Watch now and join the discussion!

Paper link: https://www.sciencedirect.com/science… 00:00 Introduction 00:29 The Quantum Nature of Gravitational Waves – A Theoretical Breakthrough 02:21 The Research Behind the Discovery 04:13 Implications and the Future of Quantum Gravitational Wave Research 07:30 Outro 07:43 Enjoy MUSIC TITLE : Starlight Harmonies MUSIC LINK : https://pixabay.com/music/pulses-star… Visit our website for up-to-the-minute updates: www.nasaspacenews.com Follow us Facebook: / nasaspacenews Twitter: / spacenewsnasa Join this channel to get access to these perks: / @nasaspacenewsagency #NSN #NASA #Astronomy#QuantumPhysics #GravitationalWaves #SpaceTime #QuantumGravity #Einstein #Physics #Astrophysics #Science #BlackHoles #LIGO #QuantumEntanglement #Cosmology #DarkMatter #BigBang #QuantumMechanics #ScienceExplained #FutureOfPhysics #Space #QuantumWorld #Relativity #TimeTravel #HiggsBoson #StringTheory #AstroScience #QuantumTechnology #SpaceExploration #GeneralRelativity #UnifiedTheory #TheoreticalPhysics #QuantumReality #WaveParticleDuality.

Chapters:
00:00 Introduction.
00:29 The Quantum Nature of Gravitational Waves – A Theoretical Breakthrough.
02:21 The Research Behind the Discovery.
04:13 Implications and the Future of Quantum Gravitational Wave Research.
07:30 Outro.
07:43 Enjoy.

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Continue reading “Quantum Gravity! New Research Explains How Space-Time Could Be Entangled” | >

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), Chinese astronomers have detected a new ultra-faint dwarf galaxy, which turned out to be gas-rich. The finding was reported in a research paper published March 12 on the preprint server arXiv.

The so-called ultra-faint dwarf (UFDs) are the least luminous, most –dominated, and least chemically evolved galaxies known. Therefore, they are perceived by astronomers as the best candidate fossils from the universe at its early stages.

A team of astronomers led by Jin-Long Xu of the Chinese Academy of Sciences (CAS) is carrying out a FAST extragalactic H I (neutral atomic hydrogen) survey (FASHI). One of the objectives of this survey is to search for dark and weak galaxies. Now, they report the finding of a new UFD as part of this project.

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A new study using the Dark Energy Survey (DES) final datasets suggests potential inconsistencies in the standard cosmological model, known as ΛCDM. If confirmed, these findings could fundamentally alter our understanding of the universe.

DES was conducted using the 570-megapixel Department of Energy-fabricated Dark Energy Camera (DECam), mounted on the U.S. National Science Foundation Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile, a Program of NSF NOIRLab.

The ΛCDM (Lambda-CDM) model has been the foundation of modern cosmology for some time now, successfully describing large-scale structures in the universe. It proposes that 95% of the cosmos is composed of (25%) and dark energy (70%)—mysterious substances whose nature remains unknown. Only 5% of the universe consists of ordinary matter.

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Dark energy, the mysterious force thought to be driving the ever-faster expansion of the universe, appears to be changing over time, according to new observations released Wednesday.

If dark energy is in fact weakening, it would likely mean that science’s understanding of how the universe works will need to be rewritten.

The new findings come from the Dark Energy Spectroscopic Instrument (DESI), which sits on a telescope at the Kitt Peak National Observatory in the U.S. state of Arizona.

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Swirling through the Milky Way’s central zone, in the turbulent region surrounding the supermassive black hole at the core of our galaxy, dust and gases constantly churn as energetic shock waves ripple throughout. An international team of astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have sharpened our view of this action by a factor of 100, discovering a surprising new filamentary structure in this mysterious region of space.

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New insights from the Atacama Cosmology Telescope offer unprecedented images of the universe at 380,000 years old, revealing movements and polarization of cosmic light with exceptional clarity.

These findings not only enhance our understanding of cosmic microwave background radiation but also confirm the fundamental theories of cosmic structure and expansion, while setting new standards for observational cosmology.

Revolutionary Universe Imaging

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Dark matter could be an entire dark sector of the universe, with its own particles and forces.

By Kathryn Zurek edited by Clara Moskowitz

Have you ever stood by the sea and been overwhelmed by its vastness, by how quickly it could roll in and swallow you? Evidence suggests that we are suspended in a cosmic sea of dark matter, a mysterious substance that shapes galaxies and large structures in the universe but is transparent to photons, the carriers of the electromagnetic force. Our galactic home, the Milky Way, is submerged in dark matter, but this hidden body but does not devour us, because its forces cannot touch the regular matter we’re made of.

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Have you ever heard of—or even seen—red lightning? These are not animated characters but real atmospheric phenomena known as electrical discharges that occur high above thunderstorms. Scientists refer to them as “red sprites,” named for their jellyfish-like appearance and vivid red flashes. Now, imagine witnessing these mesmerizing displays over the world’s highest mountain range—the Himalayas.

On the night of May 19, 2022, two Chinese astrophotographers, Angel An and Shuchang Dong, captured a spectacular display of over one hundred over the Himalayas. The observation site, located on the southern Tibetan Plateau near Pumoyongcuo Lake—one of the region’s three sacred lakes—revealed a breathtaking celestial event.

Among the phenomena captured were dancing sprites, rare secondary jets, and the first-ever recorded case in Asia of green airglow at the base of the nighttime ionosphere, dubbed “ghost sprites.” This extraordinary event attracted global attention and was widely covered by major media outlets.

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