Researchers propose that natural forces of the universe slowly weakening as it ages could explain phenomena such as galaxy rotation and expansion. This new approach challenges established concepts by explaining these observations with the same equation without needing dark matter or dark energy.
Researchers from Tel Aviv University predict that detecting radio waves from the cosmic dark ages can help resolve the nature of dark matter. The study uses computer simulations to show that dense clumps of dark matter formed throughout the Universe, pulling in hydrogen gas and causing it to emit intense radio waves.
Researchers used the James Webb Space Telescope to study 12 quasars from 12.9 billion years ago, revealing mature galaxies with active supermassive black holes. This challenges previous research suggesting black hole activity suppresses galaxy growth, instead showing a complex relationship between the two.
Researchers at Rutgers University uncovered evidence of how galaxies expand by tracing the invisible scaffolding of the universe created by dark matter. They analyzed large samples of special galaxies called Lyman-alpha emitters to study galaxy formation and evolution over billions of years.
A new study uses advanced computer simulations to shed light on the fundamental properties of dark matter. The research reveals how gas clouds in the early Universe could reveal information about dark matter's mass, which is crucial for particle physicists to develop theoretical models.
A team of scholars from USC, UC Riverside, and Carnegie Observatories will develop computer models to simulate the birth of structure in the universe, testing theories about galaxy formation. The Lyman-Alpha forest Research Collaboration aims to reveal quantum properties of dark matter and neutrino particles.
Astronomers suggest that tiny red objects spotted by NASA's James Webb Space Telescope could be giant spheres of hot gas powered by supermassive black holes. The objects, called 'universe breakers,' defy prior understanding of galaxy formation and may represent an entirely new class of celestial object.
A team of scientists used over 250,000 computer simulations to study the cosmic web and understand the influence of primordial magnetic fields. They found that these fields may have been billions of times weaker than a small fridge magnet, yet their traces still remain in the universe.
The study finds that dark energy's influence on the universe is changing over cosmic time, which can be understood as a signal of matter being converted into dark energy. The data also provides evidence for neutrinos having mass greater than zero, improving previous interpretations.
Researchers use numerical relativity to probe the universe's biggest questions, including the Big Bang, cosmic inflation, and multiverse theories. The method allows for exploration of extreme situations beyond current mathematical limits.
A University of Queensland researcher developed a new mathematical model explaining the universe's evolution, including collapsing regions of matter and expanding voids. The model resolves long-standing issues like Hubble tension and dynamical dark energy, showing complexity in the universe impacts cosmological measurements.
Researchers used infrared images to spot bright objects, then applied the 'dropout' technique to confirm their nature. The study could challenge current ideas about galaxy formation in the early universe if confirmed.
A new theoretical study proposes a comprehensive framework for the birth of supermassive black holes, linking their formation to the early universe's 'Population III.1' stars. The 'Pop III.1' model predicts rapid ionization by these stars, shedding light on long-standing cosmological conundrums.
Researchers at Max-Planck-Institut für Kernphysik recreated a reaction under conditions similar to those in the early universe for the first time. They found that the rate of this reaction remains almost constant with decreasing temperature, contradicting previous predictions.
A team of scientists presents a revolutionary theory about the origins of the Universe, proposing that gravity and quantum mechanics are sufficient to explain its structure. The new model relies on natural quantum fluctuations in space-time and gravitational waves to seed density differences that led to galaxy formation.
Roman will scan a large region of the cosmos every five days for two years, detecting around 27,000 type Ia supernovae and 60,000 core-collapse supernovae. These observations will help scientists understand dark energy, the universe's expansion, and fill gaps in our understanding of cosmic history.
Researchers suggest our galaxy might sit in a large, local void that makes the cosmos expand faster here than elsewhere. The 'sound of the Big Bang' supports this idea by distorting baryon acoustic oscillations, which provide a standard ruler for charting cosmic expansion history.
Astronomers aim to unlock secrets of the 'Cosmic Dawn' by sending a miniature spacecraft to detect faint signals from hydrogen in early universe. The UK-led CosmoCube mission would observe from far side of Moon, creating a quiet spot to listen for an 'ancient whisper'.
A team of researchers has discovered that a specific radio signal can reveal the masses of the earliest stars, crucial for understanding the Cosmic Dawn. The study utilizes the 21-centimetre signal, created by hydrogen atoms filling gaps between star-forming regions, to inform predictions about future radio telescopes like REACH and SKA.
Researchers surveyed luminous infrared galaxies to gain insight into galaxy formation in the early universe and possibly the Milky Way. They discovered massive clumps of newborn stars, unlike anything seen in the Milky Way.
A new study explores how heaviest particles interact in hot, dense environments similar to the primordial universe. Researchers found that these interactions are crucial for accurately interpreting data from experiments at large scientific infrastructures like LHC and RHIC.
Researchers propose a new subset of string theories that incorporate dynamic tension could help describe the real universe without violating observational constraints. This approach may alleviate the 'swampland problem,' which has hindered conventional string theory's ability to reproduce inflation and dark energy.
The COSMOS-Web field maps nearly 800,000 galaxies spanning 98% of cosmic time, challenging existing notions of the infant universe. Researchers see roughly 10 times more galaxies than expected at incredible distances, sparking new questions about the early universe and its mysteries.
Researchers have found that most Lyman Alpha Emitters (LAEs) are experiencing their first major burst of star formation, revealing crucial insights into galaxy development and the early stages of the universe. The study sheds light on the Milky Way's origin story, providing key information about how galaxies grow and evolve.
A team led by UChicago scientist Wendy Freedman has used the James Webb Space Telescope to find no evidence of tension in the Hubble Constant, resolving a decade-long conflict. The new data strengthens the Standard Model of the universe, suggesting that the Hubble Constant may not be the source of inconsistencies.
A team from Norwegian University of Science and Technology proposes that supermassive black hole winds accelerate particles to create the mysterious high-energy radiation. The winds, which can reach speeds of up to half the speed of light, may be responsible for the creation of ultra-high-energy cosmic rays.
Ryan Cooke and Max Pettini determined the D/H ratio to an accuracy of one percent, correlating it to the density of regular matter in the universe. Their measurement is in excellent agreement with a separate method, validating Big Bang Nucleosynthesis as a tool for precision cosmology.
Researchers at Dartmouth College propose a new theory on the origin of dark matter, suggesting it could have formed from high-energy massless particles that rapidly condensed into cold, heavy particles. The theory can be tested using existing observational data, including the Cosmic Microwave Background radiation.
Astrophysicist Jeremy Darling is pursuing a new method to measure the universe's gravitational wave background by analyzing the motion of quasars. His research could unravel the physics of gravity and help scientists understand galaxy evolution and fundamental assumptions about gravity.
Researchers propose universe may rotate with one rotation every 500 billion years, resolving Hubble tension paradox and explaining discrepancies in astronomical measurements. The theory is compatible with current models and doesn't break any known laws of physics.
Researchers found a mature spiral galaxy, Zhúlóng, with a structure similar to the Milky Way's, challenging previous expectations that large disks take billions of years to form. This discovery suggests that spiral arms can develop on shorter timescales and may be short-lived in the early Universe.
Researchers have found evidence of a new population of faint galaxies hidden in the far-infrared sky, which could break current models of galaxy numbers and evolution. The discovery was made using data from the Herschel Space Observatory, which revealed a deeper image of the universe than ever before.
A new study proposes a third category of galaxies: red star-forming. These galaxies produce low-mass stars and may have played a significant role in the universe's history. The findings could change our understanding of galaxy evolution, star formation, and the life cycle of galaxies.
Astronomers have discovered a clear sign of reionization beginning significantly earlier than thought in one of the most distant galaxies detected by James Webb. The galaxy's Lyman alpha light suggests an ionized bubble, a telltale signature of the Universe becoming transparent.
The latest DESI data suggests that dark energy's impact on the universe's acceleration may be weakening over time. Researchers are seeing hints that evolving dark energy could be a more accurate explanation for their findings, which are backed by multiple lines of evidence from different experiments.
The Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe’s infancy. These new images show subtle variations in density and velocity of gases in the young universe, helping scientists answer longstanding questions about the universe’s origins.
Researchers propose a revolutionary link between time and dark energy, suggesting that the mysterious force driving the universe's expansion may be used to measure time. The study could pave the way for groundbreaking new fundamental theories and breakthroughs in our understanding of the universe.
Researchers found Andromeda XXXV, the smallest and dimmest satellite galaxy to date, which challenges our understanding of galaxy formation and evolution. The discovery provides new insights into how galaxies survive different epochs of the universe.
A team of researchers from Kyushu University discovered that about 60% of molecular clouds in the Small Magellanic Cloud had a filamentary structure, while 40% were 'fluffy' with higher temperatures. This finding provides new insights into star formation in early-universe-like environments.
The release of a unique Type Ia Supernovae dataset has significant implications for cosmologists measuring the universe's expansion history. The dataset, comprising 3628 supernovae, provides unprecedented precision and accuracy in exploring the properties of these events.
Researchers propose a new methodology to test the Universe's isotropy using Euclid space telescope data, aiming to detect potential anisotropies that challenge the Standard Model of Cosmology. If confirmed, these findings would open a new chapter in cosmology, potentially revising our understanding of the Universe's behavior.
A research team has found that dark matter makes up about 60% of the mass of two galaxies at a redshift of 6, shedding light on its role in galaxy evolution. This discovery offers new insights into the intricate relationship between dark matter and supermassive black holes.
Scientists have discovered a distant, two-lobed radio jet that spans an astonishing 200,000 light-years at least, twice the width of the Milky Way. The team used a combination of telescopes to detect the jet and measure its properties, including the mass of the quasar producing it.
Physicists have gained valuable insights into false vacuum decay using a quantum machine, which could determine the ultimate fate of the Universe. The simulation reveals complex interactions between bubbles in a false vacuum, offering new possibilities for studying the fundamental physics of the Universe.
Researchers have developed a new approach to analyzing cosmic maps, known as field-level inference, which preserves the fidelity of the data and can improve the determination of cosmological parameters by a factor of 3.5 to 5.2 compared to standard methods.
New measurements of the Hubble constant support a faster-than-expected Universe expansion rate, challenging current understanding of physics. A precise distance measurement to the Coma Cluster provides the foundation for this new result.
Edwin Hubble discovered a new universe by analyzing the brightness of stars, revealing that our galaxy is just one of billions in the universe. His findings showed that galaxies move away from each other at faster speeds with greater distances.
Astronomers discovered three ultra-faint dwarf galaxies in an isolated region of space, containing only very old stars. The findings support the theory that events in the early universe cut off star formation in small galaxies.
Astronomers have detected a supermassive black hole with a jet pointed towards Earth in the first billion years of the universe. The discovery offers crucial information for studying reionization and could point to other supermassive black hole candidates from the early universe.
Researchers suggest that gravitational collapse in the early universe could give rise to incredibly dense point-like objects, namely visible or naked singularities. This ultra-strong gravity condition provides a unique opportunity to probe new fundamental aspects of physics, including quantum gravity. The possibility of PNaSs accountin...
Researchers observed a galaxy nearly 6.5 billion light-years away, revealing a large number of individual stars made visible through gravitational lensing. The discovery provides new insights into the universe's greatest mysteries, including dark matter and stellar populations.
A team of physicists and astronomers found that the Universe is expanding in a more varied way than previously thought, making dark energy unnecessary. The new evidence supports the timescape model of cosmic expansion, which attributes differences in stretching light to calibration issues rather than dark energy.
Researchers at SISSA used a backward approach to derive the mass of newly formed stars from observations of supernovae and gamma-ray bursts. The result is surprisingly similar to that measured in regions closest to us, suggesting a possible universal initial mass function. This discovery will be tested by future telescope observations.
Astronomers detect a massive black hole in the early universe that is lying dormant due to low accretion rates, sparking debate about its formation and growth. The discovery challenges standard models of black hole development and suggests that these monsters may be born big or go through periods of hyperactivity.
Researchers used NASA's James Webb Space Telescope to study stars in a nearby galaxy with limited heavy elements. They found that some star-forming disks persist longer than predicted, allowing planets to form and grow bigger.
A new paper in JCAP proposes a way to test the anthropic principle, which suggests the universe is fine-tuned for life. The proposal involves confirming three conditions: cosmic inflation, axion existence, and dark matter not being made of axions.
The new Webb Space Telescope study confirms Hubble's expansion rate measurements, offering a crucial cross-check to address the mismatch in measurements. The discrepancy remains unexplained even by the best cosmology models, suggesting that our understanding of the universe may be incomplete.
Scientists have discovered birth sites of gigantic elliptical galaxies, suggesting large gas flows and galaxy collisions created these ancient systems. The research, published in Nature, may finally unravel the enigma of how these giant galaxies formed.
Researchers found evidence of spheroid formation in distant submillimeter-bright galaxies, which challenges current understanding of galaxy evolution. The study provides the first solid observational evidence that spheroids can form directly through intense star formation within the cores of highly luminous starburst galaxies.
Researchers propose that dark matter may have originated from a separate 'Dark Big Bang,' occurring shortly after the universe's birth. The study explores possible scenarios for this new theory and determines potential observable consequences, including gravitational waves detectable by future experiments.