Our current best theories of the universe suggest that dark energy is making it expand faster and faster, but new observations from the Dark Energy Spectroscopic Instrument suggest this mysterious force is actually growing weaker
Category: cosmology – Page 11
Findings from the Dark Energy Spectroscopic Instrument (DESI) suggest that dark energy could be evolving over time. If they’re right, cosmology will need a.
The Dark Energy Spectroscopic Instrument (DESI) is mapping millions of celestial objects to better understand dark energy—the mysterious driver of our universe’s accelerating expansion. Today, the DESI collaboration released a new collection of data for anyone in the world to investigate.
The dataset is the largest of its kind, with information on 18.7 million objects: roughly 4 million stars, 13.1 million galaxies, and 1.6 million quasars (extremely bright but distant objects powered by supermassive black holes at their cores).
While the experiment’s main mission is illuminating dark energy, DESI’s Data Release 1 (DR1) could yield discoveries in other areas of astrophysics, such as the evolution of galaxies and black holes, the nature of dark matter, and the structure of the Milky Way.
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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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:
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A radical new theory challenges everything we know about the universe’s origins. A quantum twist could explain the cosmos’ most baffling mysteries. Dark matter and dark energy might finally have an answer.
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 galaxies (UFDs) are the least luminous, most dark matter –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.
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 dark matter (25%) and dark energy (70%)—mysterious substances whose nature remains unknown. Only 5% of the universe consists of ordinary matter.
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.
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.