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Gravity Confirmed to Follow Newton and Einstein's Laws at Cosmic Scales

Gravity Confirmed to Follow Newton and Einstein's Laws at Cosmic Scales

Recent observations from the Atacama Cosmology Telescope (ACT) have confirmed that gravity behaves according to Newton's and Einstein's laws even at cosmic scales. The study, led by Patricio A. Gallardo from the University of Pennsylvania, tested gravity across galaxy clusters separated by hundreds of millions of light-years. The findings, published in Physical Review Letters, show that gravity's strength weakens with distance as predicted by the inverse square law. This confirmation supports the standard model of cosmology and challenges theories like Modified Newtonian Dynamics (MOND) that propose changes to gravity's behavior.

Alena Tensor Framework Proposes New Explanation for Dark Matter Without Invisible Particles

Alena Tensor Framework Proposes New Explanation for Dark Matter Without Invisible Particles

A new mathematical framework called Alena Tensor is offering a novel approach to understanding dark matter and dark energy without relying on the existence of invisible particles. Developed by Piotr Ogonowski, the Alena Tensor allows for the description of physical systems in both curved and flat spacetime, integrating classical mechanics and quantum theory. This framework suggests that the gravitational effects typically attributed to dark matter could instead be explained by the internal dynamics and rotational behaviors of galaxies. The Alena Tensor has been tested against over a hundred galaxies, showing promising results in explaining their rotation curves, often outperforming the Modified Newtonian Dynamics (MOND) model. Additionally, the framework provides a new perspective on dark energy, treating it as an inherent property of the fields rather than an arbitrary addition to Einstein's equations.

DESI Completes 3D Universe Map, Paving Way for Dark Energy Exploration

DESI Completes 3D Universe Map, Paving Way for Dark Energy Exploration

The Dark Energy Spectroscopic Instrument (DESI) has successfully completed its planned 3D map of the universe, exceeding expectations by observing over 47 million galaxies and quasars. This achievement marks a significant milestone in the study of dark energy, a mysterious force driving the universe's accelerated expansion. DESI's map will allow researchers to explore the universe's structure and evolution, providing insights into dark energy and dark matter. The project, which began in 2021, overcame challenges such as the COVID-19 pandemic and natural disasters, demonstrating the resilience and dedication of the scientific team.

DESI Completes 3D Map of the Universe, Surpassing Initial Goals

DESI Completes 3D Map of the Universe, Surpassing Initial Goals

The Dark Energy Spectroscopic Instrument (DESI) has successfully completed its planned 3D map of the universe, significantly surpassing its initial objectives. Originally set to gather data on 34 million galaxies and quasars over a five-year period, DESI has instead captured information on over 47 million galaxies and quasars, along with more than 20 million nearby stars. This achievement marks a major milestone in cosmological research, as DESI has now measured data for six times as many galaxies and quasars as all previous measurements combined. The project, which began data collection in May 2021, faced challenges such as the COVID-19 pandemic and natural disasters, yet managed to exceed expectations. DESI will continue its observations through 2028, expanding its map by about 20% to cover more of the sky, particularly areas that are difficult to observe due to bright nearby stars or atmospheric interference.

New Theory Suggests Dark Matter Could Be Black Holes from Another Universe

New Theory Suggests Dark Matter Could Be Black Holes from Another Universe

A new theory proposes that dark matter might be composed of relic black holes from a universe that existed before the Big Bang. This hypothesis challenges the traditional view that dark matter consists of undiscovered sub-atomic particles. The theory suggests that these black holes survived a cosmic 'bounce,' a phase where the universe contracted before expanding again. This idea could explain the presence of massive, luminous objects in the early universe, observed by the James Webb Space Telescope, which are difficult to account for under standard cosmological models.

UF Astronomer Contributes to Largest 3D Map of the Universe

UF Astronomer Contributes to Largest 3D Map of the Universe

Zachary Slepian, Ph.D., an associate professor of astronomy at the University of Florida, is part of the team behind the Dark Energy Spectroscopic Instrument (DESI) project. This five-year survey has produced the largest high-resolution 3D map of the universe, charting over 47 million galaxies and quasars. Mounted on the Nicholas U. Mayall Telescope in Arizona, DESI uses robotic fiber optic positioners to collect light from thousands of galaxies simultaneously. By analyzing this light, scientists can measure each galaxy's distance and motion, contributing to a comprehensive understanding of the universe's structure.

Fred Young Submillimeter Telescope Inaugurated in Chile's Atacama Desert, Promising New Cosmic Insights

Fred Young Submillimeter Telescope Inaugurated in Chile's Atacama Desert, Promising New Cosmic Insights

The Fred Young Submillimeter Telescope (FYST), a significant astronomical instrument, has been inaugurated at the summit of Cerro Chajnantor in Chile's Atacama Desert. This telescope, which has been in development for three decades, is situated at an altitude of 18,400 feet, making it one of the highest observatories in the world. The location was chosen for its exceptionally dry and thin air, ideal for observing submillimeter wavelengths that are otherwise absorbed by atmospheric water vapor. FYST's innovative design allows it to rapidly survey large areas of the sky, equipped with over 100,000 superconducting detectors. This capability positions it as a powerful tool for mapping the cosmic microwave background and studying galaxy clusters, star formation, and the epoch of reionization. The telescope is a collaborative project led by the CCAT Observatory, involving institutions from the U.S., Germany, Canada, and Chile.

UF Astronomer Contributes to Creation of Largest 3D Map of the Universe

UF Astronomer Contributes to Creation of Largest 3D Map of the Universe

Zachary Slepian, Ph.D., an associate professor of astronomy at the University of Florida, is part of an international collaboration that has developed the largest high-resolution three-dimensional map of the universe. This effort is part of the Dark Energy Spectroscopic Instrument (DESI) survey, a five-year project funded by the U.S. Department of Energy. The map charts the positions of over 47 million galaxies and quasars, providing insights into billions of years of cosmic history. DESI, mounted on the Nicholas U. Mayall Telescope at Kitt Peak National Observatory in Arizona, uses 5,000 robotic fiber optic positioners to collect light from thousands of galaxies simultaneously. By analyzing the light's component colors, scientists can measure each galaxy's distance and motion, contributing to the comprehensive 3D map.

Emma Chapman's 'Radio Universe' Explores Cosmic Discoveries Through Radio Waves

Emma Chapman's 'Radio Universe' Explores Cosmic Discoveries Through Radio Waves

Emma Chapman's 'Radio Universe' Explores Cosmic Discoveries Through Radio Waves

UC Riverside Physicist Proposes Self-Interacting Dark Matter to Solve Cosmic Puzzles

UC Riverside Physicist Proposes Self-Interacting Dark Matter to Solve Cosmic Puzzles

A study led by Hai-Bo Yu, a physicist at the University of California, Riverside, suggests that self-interacting dark matter (SIDM) could provide explanations for three astrophysical puzzles. Published in Physical Review Letters, the research indicates that dense clumps of SIDM, each about a million times the mass of the sun, can account for unusual gravitational effects observed in various cosmic phenomena. These include gravitational lenses, stellar streams, and satellite galaxies. Unlike the standard model of dark matter, which assumes particles are 'cold' and collisionless, SIDM involves particles that collide and exchange energy, potentially leading to 'gravothermal collapse' and the formation of dense cores.

Astronomers Discover Universe's 'Missing' Hydrogen in Gas Halos

Astronomers Discover Universe's 'Missing' Hydrogen in Gas Halos

A new study has revealed that hydrogen gas clouds, or halos, surrounding galaxies are more prevalent than previously thought. Using the Hobby-Eberly Telescope, researchers identified over 33,000 hydrogen gas halos, significantly increasing the known number from about 3,000. These halos, ranging from tens of thousands to hundreds of thousands of light-years across, provide crucial data for understanding star formation and galaxy evolution during the 'cosmic noon' period, 10 to 12 billion years ago.

Astronomers Expand Knowledge of Hydrogen Gas Halos in Early Universe

Astronomers Expand Knowledge of Hydrogen Gas Halos in Early Universe

A comprehensive survey using the Hobby-Eberly Telescope has expanded the known population of hydrogen gas halos, or Lyman-alpha nebulae, surrounding young galaxies. The study identified over 33,000 halos, significantly increasing the previous count of about 3,000. These halos, observed during the 'Cosmic Noon' period, provide essential data for understanding star formation and galaxy evolution. The findings reveal that such structures are more common and diverse than previously thought, offering new insights into the early universe.