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Astrophysics & Cosmology
Black holes, dark matter, gravitational waves, and the big‑picture universe.
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Galaxies in the early universe are weird. These stars may explain why
23+ min ago (1161+ words) New Hubble TEMPOS survey of 29 massive stars in extremely metal-poor galaxies finds unexpectedly weak stellar winds and delivers the largest-ever dataset of its kind, which could reshape our understanding of how galaxies formed in the early universe The relative size…...
Can Planets Form Around Supermassive Black Holes?
5+ hour, 3+ min ago (1239+ words) Planets are usually associated with stars, but the physics of planet formation may not be limited to star systems. In a recent SETI Live conversation, SETI Institute research scientist Dr. Lauren Sgro spoke with astrophysicists Dr. Bhupendra Mishra and Dr....
Large Hadron Collider is still on the hunt for short-lived quantum black holes and a theory of everything
1+ hour ago (727+ words) "You don't often have a situation which is really tiny but also extremely heavy." The discovery of such objects could help solve some of the mysteries surrounding the structure of space and time, united as a four-dimensional entity called "spacetime....
The strange 2% rule: Why black holes suddenly switch on their powerful jets
2+ hour, 6+ min ago (161+ words) A new study reveals black holes become predictable when feeding. Jets emerge when accretion rates fall to two percent of the Eddington limit. This threshold applies to black holes of vastly different sizes. Tidal disruption events offer a rare view…...
Biggest Supernova Dataset Yet Challenges Dark Energy Theory
2+ hour, 38+ min ago (630+ words) Nearly 3,000 exploding stars have revealed a startling possibility: the mysterious force accelerating the universe may be changing over time. The largest catalog of Type Ia supernovae assembled so far is giving astronomers a more detailed record of cosmic expansion. The…...
Researchers Link Spacetime Detectors Via Holographic Duality
5+ hour, 40+ min ago (647+ words) Can entanglement be harvested between quantum detectors located on opposite sides of a holographic boundary? Calculations now demonstrate this is possible, quantifying entanglement generation to quadratic order in the coupling constant λ. This establishes a connection between local detectors within…...
Black Holes May Create Stars Rather Than Just Destroy Them
3+ hour, 59+ min ago (323+ words) BGNES Active supermassive black holes may be drivers of star formation rather than agents of destruction, according to a new study reported by Smithsonian Magazine Scientists have mapped the structure of nine bright galactic nuclei relatively close to the Milky…...
Galaxies in the early universe are weird. These stars may explain why. - @theU
4+ hour, 13+ min ago (995+ words) The more astronomers learn about the universe’s earliest galaxies, the stranger they seem. Many of their surprising properties may be explained by differences between their massive stars and those in galaxies like our own Milky Way. A new University of…...
How black holes can fuel star formation instead of shutting it down
23+ hour, 22+ min ago (986+ words) Black holes can suppress star formation, but nine nearby galaxies reveal how their outflows could also help trigger the birth of new stars. In the usual account of a growing black hole, its activity can suppress star formation in the…...
A “copy” of the Milky Way turned out to be surprisingly bizarre
15+ hour, 43+ min ago (322+ words) In detailed images obtained with the Hubble Space Telescope, the galaxy NGC 4698 appears to be a typical, elegant spiral system. It is located 55 million light-years from Earth and is part of the enormous Virgo Cluster — the nearest large gravitationally bound…...