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Do "completely dark" dark matter halos exist?
San Diego CA (SPX) Apr 14, 2025 Every galaxy is thought to form at the center of a dark matter halo - a region of gravitationally bound matter that extends far beyond the visible boundaries of a galaxy. Stars are formed when gravity within dark matter halos draws in gas, but astrophysicists don't yet know whether star-free dark matter halos exist. Now Ethan Nadler, a computational astrophysicist at UC San Diego, has calculated the mass below which halos fail to form stars. This work was done using analytic predictions from galax ... read more |
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Research reveals tidal forces disrupting nearby dwarf galaxyTokyo, Japan (SPX) Apr 14, 2025 New research led by Satoya Nakano and Kengo Tachihara at Nagoya University has uncovered compelling evidence that the Small Magellanic Cloud (SMC), one of the Milky Way's closest galactic neighbors, ... more 
Half of the universe's hydrogen gas, long unaccounted for, has been foundBerkeley CA (SPX) Apr 16, 2025 Astronomers tallying up all the normal matter - stars, galaxies and gas - in the universe today have come up embarrassingly short of the total matter produced in the Big Bang 13.6 billion years ago. ... more 
New evidence suggesting magnetar origin of GRBsBeijing, China (SPX) Apr 16, 2025 How gamma-ray bursts (GRBs), the most powerful and spectacular explosions known in the universe since the Big Bang, fuel their high-energy radiations? What kind of physical reactions can trigger and ... more 
Research reveals gravitational forces may be dismantling Milky Way's small neighborTokyo, Japan (SPX) Apr 14, 2025 A new study led by researchers at Nagoya University has uncovered compelling evidence that the Small Magellanic Cloud (SMC), one of the Milky Way's closest galactic neighbors, may be undergoing grav ... more |
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FSU researchers part of TESSERACT's hunt for dark matterTallahassee, FL (SPX) Mar 25, 2025 For decades, people have been trying to directly detect dark matter: the missing mass in our universe. Now, research from the FAMU-FSU College of Engineering is making possible a new, super-sensitiv ... more 
AI boosts accuracy in stellar classification effortsSydney, Australia (SPX) Mar 25, 2025 AI tools are revolutionizing the way astronomers study celestial bodies, offering new levels of precision and automation in classifying stars. A global research collaboration recently demonstrated h ... more 
NASA's SPHEREx Space Telescope Begins Skyward Mission After Shedding Protective ShieldLos Angeles CA (SPX) Mar 24, 2025 NASA's SPHEREx mission, newly launched into low Earth orbit on March 11, has taken a major step toward beginning its cosmic survey by discarding its dust cover. On March 18, mission controllers succ ... more 
Concept for interstellar object encounters developed, then simulated using a spacecraft swarmUrbana, IL (SPX) Mar 24, 2025 Interstellar objects are among the last unexplored classes of solar system objects, holding tantalizing information about primitive materials from exoplanetary star systems. They pass through our so ... more 
Cosmic megajets reveal possible future threat to EarthLondon, UK (SPX) Mar 24, 2025 A startling cosmic discovery has shed light on a potential future for the Milky Way, revealing that it could one day generate powerful radiation jets capable of endangering life on Earth. Astr ... more |
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New DESI results strengthen hints that dark energy may evolve
Columbus OH (SPX) Mar 21, 2025 The discovery of dark energy, nearly 30 years ago, was already the biggest surprise of my scientific lifetime," said David Weinberg, a professor of astronomy at Ohio State who also contributed to the DESI analysis. "These new measurements offer the strongest evidence so far that dark energy evolves, which would be another mind-blowing change to our understanding of how the universe works." DESI is an international experiment with more than 900 researchers from over 70 institutions around the world ... read more 
DESI opens access to the largest 3D map of the universe yetBerkeley CA (SPX) Mar 20, 2025 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. This week, ... more |
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Oxygen detected in most distant galaxy: 'astonished' astronomersParis (AFP) Mar 20, 2025 Oxygen has been detected in the most distant galaxy ever discovered, surprised astronomers said Thursday, offering further evidence that stars in the early universe matured far quicker than had been thought possible. ... more 
Chile reviews Chinese observatory plans slammed by USSantiago (AFP) Mar 19, 2025 Chile said Wednesday it was reviewing an agreement for the construction of a Chinese astronomical observatory on its soil, a project that has drawn criticism from Washington as it jostles with Beijing for influence in Latin America. ... more 
Cosmic ray research accelerated by machine learning insightsBerlin, Germany (SPX) Mar 19, 2025 The complexity of artificial intelligence (AI), particularly neural networks modeled on the human brain, often sparks apprehension due to their opaque nature. While the societal implications of such ... more 
Dark energy seems to be changing, rattling our view of universeParis (AFP) Mar 19, 2025 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. ... more 
'Dark universe detective' telescope releases first dataParis (AFP) Mar 19, 2025 Europe's Euclid space telescope, which is on a mission to shed light on the mysteries of dark matter and dark energy, released its first data Wednesday with a little help from volunteers and artificial intelligence. ... more |
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