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DESI Completes Largest 3D Map of the Universe, Advances Dark Energy Research

DESI Completes Largest 3D Map of the Universe, Advances Dark Energy Research

The Dark Energy Spectroscopic Instrument (DESI) has successfully completed the largest high-resolution 3D map of the universe, marking a significant milestone in the study of cosmic expansion. DESI's 5,000 fiber-optic sensors captured their final observations, focusing on a region near the Little Dipper. This project, involving global institutions such as the University of Portsmouth and Berkeley Lab, has exceeded its data collection goals, providing more information than initially projected. The data is being used to investigate dark energy, a mysterious force constituting about 70% of the universe, which drives its accelerating expansion. Early results suggest that dark energy might be evolving over time, challenging the long-held belief of it being a cosmological constant.

DESI Completes Largest 3D Map of Universe, Illuminating Dark Energy Mysteries

DESI Completes Largest 3D Map of Universe, Illuminating Dark Energy Mysteries

The Dark Energy Spectroscopic Instrument (DESI) has completed the most comprehensive 3D map of the universe, significantly advancing the understanding of dark energy. Over five years, DESI mapped 47 million galaxies and quasars, surpassing its original target. This achievement, published in the Astronomy & Astrophysics journal, provides unprecedented insights into the universe's expansion and the mysterious force of dark energy. DESI's data fills gaps left by previous cosmological probes, offering new sensitivity to study dark energy's nature. The findings suggest potential shifts in the standard cosmological model, indicating that dark energy may fluctuate in strength, challenging existing theories.

DESI Completes 3D Universe Map, Advances Dark Energy Research

DESI Completes 3D Universe Map, Advances Dark Energy Research

The Dark Energy Spectroscopic Instrument (DESI) has successfully completed the largest high-resolution 3D map of the universe, marking a significant milestone in understanding cosmic expansion. The project, involving over 900 researchers from more than 70 institutions worldwide, including the University of Portsmouth and Berkeley Lab, has surpassed its original goals by capturing data from over 47 million galaxies and quasars. This extensive dataset is being used to investigate dark energy, a mysterious force that constitutes about 70% of the universe and drives its accelerating expansion. Early results suggest that dark energy might be evolving over time, challenging the long-held belief of it being a 'cosmological constant'. The completion of this map allows researchers to trace dark energy's influence over 11 billion years of cosmic history.

Australian National University Physicists Demonstrate Quantum Entanglement in Atoms, Advancing Quantum Physics Research

Australian National University Physicists Demonstrate Quantum Entanglement in Atoms, Advancing Quantum Physics Research

Physicists at the Australian National University have successfully observed quantum entanglement in helium atoms, marking a significant advancement in quantum physics. This experiment involved splitting a cloud of helium atoms, which then scattered and fell under gravity while maintaining entangled states. This phenomenon, previously observed in photons, is more challenging to demonstrate in atoms due to their mass and the influence of gravity. The research team, led by Dr. Sean Hodgman, utilized ultracold metastable helium atoms and a Bose-Einstein condensate to achieve this result. By using laser pulses, they manipulated the atoms into different momentum states, creating entangled pairs with opposite momenta. This experiment provides a new platform for testing quantum mechanics in massive particles, potentially bridging the gap between quantum mechanics and general relativity.

El agujero negro más simple y lo que revela del universo

El agujero negro más simple y lo que revela del universo

El agujero negro de Schwarzschild es un concepto fascinante dentro de la física teórica y la relatividad general. Este tipo de agujero negro, tambi...

University of Tokyo Researchers Develop Universal Quantum Protocol for Maximum Work Extraction

University of Tokyo Researchers Develop Universal Quantum Protocol for Maximum Work Extraction

University of Tokyo Researchers Develop Universal Quantum Protocol for Maximum Work Extraction

Physicists Struggle to Resolve Hubble Tension, Highlighting Challenges in Understanding Universe's Expansion

Physicists Struggle to Resolve Hubble Tension, Highlighting Challenges in Understanding Universe's Expansion

Physicists are grappling with the 'Hubble tension,' a significant challenge in modern astronomy related to the universe's expansion rate. The Hubble constant, which measures how fast the universe is expanding, has been difficult to pin down, with different measurements yielding varying results. An international team of astronomers has recently produced one of the most precise measurements of the Hubble constant, identifying a value of around 73.5 kilometers per second per megaparsec. Despite this progress, the discrepancy between predicted and observed values remains, suggesting potential misunderstandings of the universe's fundamental laws.

Historic Discovery: Atoms Demonstrate Quantum Entanglement in Motion

Historic Discovery: Atoms Demonstrate Quantum Entanglement in Motion

Physicists at the Australian National University have observed quantum entanglement in moving helium atoms, marking a significant advancement in testing quantum physics with massive particles. The experiment involved ultracold metastable helium atoms, which were split into different momentum states using laser pulses. As these atoms separated, they collided and produced spherical halos of scattered atom pairs, demonstrating entanglement tied to motion rather than spin or polarization. This discovery confirms that matter can exist in two locations simultaneously, challenging classical physics and providing a new testing ground for quantum mechanics.

New Theory Suggests Universe Originated from Black Hole 'Bounce'

New Theory Suggests Universe Originated from Black Hole 'Bounce'

A team of physicists at the University of Portsmouth has proposed a new theory suggesting that the universe was created by a massive 'bounce' from an ancient black hole, challenging the traditional Big Bang theory. This 'Black Hole Universe' theory posits that the cosmos did not emerge from an explosion of matter but rather rebounded from a contraction phase. The idea, first introduced by Indian physicist Raj Kumar Pathria in the 1970s, has gained traction with recent data from the James Webb Space Telescope. This data shows an imbalance in the spin directions of ancient galaxies, supporting the theory that the universe was born spinning from a rotating black hole.

Scientists Propose Seven Hidden Dimensions to Explain Black Holes and Dark Matter

Scientists Propose Seven Hidden Dimensions to Explain Black Holes and Dark Matter

A new scientific model suggests that the universe may operate in seven dimensions, offering a potential solution to the longstanding mystery of black holes and dark matter. Richard Pinčák from the Slovak Academy of Sciences has proposed that, in addition to the four known dimensions, there are three hidden dimensions that form complex geometric shapes called G2-manifolds. These hidden dimensions could generate torsion fields that prevent black holes from completely evaporating, leaving behind dense remnants that retain all consumed information. This theory could also explain the nature of dark matter, which constitutes a significant portion of the universe's mass but remains undetectable.

Physicists Reexamine Boltzmann Brain Paradox and Its Implications for Memory and Reality

Physicists Reexamine Boltzmann Brain Paradox and Its Implications for Memory and Reality

A new study by physicists David Wolpert, Carlo Rovelli, and Jordan Scharnhorst revisits the Boltzmann brain hypothesis, a thought experiment questioning the reliability of memory and reality. The hypothesis suggests that in a universe existing for an extended period, random entropy fluctuations could create complex structures like brains with false memories. This challenges the conventional understanding of time and memory, raising questions about the nature of reality and the second law of thermodynamics. The study aims to clarify the assumptions underlying these concepts and their implications for our understanding of the universe.

Student-Led Experiment Sets New Limits in Axion Search

Student-Led Experiment Sets New Limits in Axion Search

A group of undergraduate students from the University of Hamburg has conducted a small-scale experiment to search for axions, a candidate for dark matter, setting new experimental limits on their properties. The experiment involved building a cavity detector using highly conductive materials and electronics, supported by the university and collaborating research groups. Despite limited resources, the students achieved meaningful scientific results by excluding the presence of axions with certain properties within the explored mass range. The study, published in the Journal of Cosmology and Astroparticle Physics, demonstrates that small-scale experiments can contribute to the search for dark matter, traditionally dominated by large observatories and complex instruments.