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Hubble Constant Mystery Deepens: New Global Study Achieves Most Precise Measurement Yet Breaking in Measuring the Universe's Expansion Rate An international collaboration of cosmologists has united leading expertise to establish a consistent framework for measuring the Hubble constant . Detailed in Astronomy & Astrophysics, this achievement could help explain why the universe seems to be expanding more rapidly than current cosmological models suggest. Understanding the Hubble Constant and Cosmic Expansion Observations of distant galaxies reveal a clear trend: the further a galaxy is, the faster it moves away from us. This near-linear relationship is defined by the Hubble constant , a key value that describes the present rate of expansion of the universe. It also serves as a crucial tool for estimating the time since the Big Bang, forming the basis of our current understanding of the universe's age. The Hubble Tension: A Major Cosmic Mystery Despite its apparent simplicity, ...

Record-Breaking Gamma-Ray Burst Lasts Seven Hours, Challenging Astronomers Understanding of Cosmic Explosions Among the universe's most powerful phenomena are gamma-ray bursts — cosmic explosions capable of releasing, in a split second, more energy than the Sun will emit over its entire ten-billion-year existence. Normally, these intense flashes disappear almost immediately, lasting seconds or at most, a few minutes. However, on 2 July 2025 , astronomers detected an event that defied every expectation. Instead of ending quickly, the signal persisted for seven hours , produced three distinct bursts throughout a single day and left behind a glowing aftereffect that continued for months. The moment it was observed, scientists recognized that this was no ordinary gamma-ray burst . Explore more space science discoveries: SETI Study Reveals Space Weather Could Be Hiding Alien Signals From Earth GRB 250702B — The Longest Gamma-Ray Burst Ever Observed The phenomenon, designated GRB 250702...

SETI Study Reveals Space Weather Could Be Hiding Alien Signals From Earth In the early 2000, my computer screen — like those of countless space enthusiasts — was often filled with bands of rainbow-coloured spectral signals. As my machine processed thousands of radio data points gathered by the SETI@Home project, I hoped I might be contributing, even in a small way, to one of humanity's most ambitious scientific pursuits: the search for extraterrestrial life. However, a new study published in The Astrophysical Journal by Vishal Gajjar and Grayce Brown of the SETI Institute suggests that the specific signals SETI@Home was designed to detect may not actually exist. This does not mean that alien civilizations are not transmitting signals into space; rather, the influence of space weather from their host star could alter those signals so dramatically that they become unrecognizable by the time they reach Earth. Why SETI Scientists Expected Narrow Alien Radio Signals Signals present a...

Dark Matter May Replace Black Hole at the Milky Way's Core, Astronomers Suggest New Astronomical Research Challenges Long-Held Assumptions about Sagittarius A* Astronomers suggest that the heart of the Milky Way may not host a supermassive black hole, but instead a vast concentration of enigmatic dark matter producing an equivalent gravitational pull. They argue that this unseen material — believed to account for most of the universe's mass — can explain both the intense motions of stars just light-hours from the galactic center and the smoother, large-scale rotation of matter across the Milky Way's outer regions. The findings were published yesterday in Monthly Notices of the Royal Astronomical Society . Rethinking the Milky Way's Dark Heart The findings challenge the prevailing view that Sagittarius A* (Sgr A*) , the proposed black hole at the center of our galaxy, governs the motion of the so-called S-stars — stellar objects that race around the core at staggering ...

Impossible Neutrino Detected: Scientists Link 2023 Cosmic Shock to Exploding Primordial Black Holes A baffling cosmic event in 2023 saw a neutrino slam into Earth with an energy level that defied all known physics . The particle was vastly more powerful than anything humanity has ever generated, dwarfing even the Large Hadron Collider's capabilities by a factor of 100,000 . Researchers at the University of Massachusetts Amherst now believe such an event could occur when a rare, early-universe black hole — described as quasi-extremal , undergoes a catastrophic explosion . Their findings, reported in Physical Review Letters , not only solve the mystery of the impossible neutrino but also position it as a potential key to understanding the universe at its most fundamental level . From Stellar Collapse to the Early Universe Black holes are no longer the stuff of speculation and scientists have a solid grasp of how they form. When a massive ageing star exhausts its nuclear fuel, ...

Astronomers Discover Mysterious Iron Bar Hidden Inside the Ring Nebula Mysterious Iron Cloud Revealed by European Research Team Astronomers from University College London and Cardiff University have uncovered a mysterious bar-shaped cloud of iron hidden within the famous Ring Nebula. The discovery was made by a European research team. First-Ever Detection of an Iron Structure Inside the Ring Nebula Reported for the first time in Monthly Notices of the Royal Astronomical Society , the structure consists of iron atoms arranged in a narrow bar or strip. It sits neatly inside the nebula's inner layer, an elliptical region well known from images captured by telescopes including the James Webb Space Telescope (JWST) at infrared wavelengths. Related space science coverage Size and Mass of the Iron Cloud The iron bar stretches to a length around 500 times the size of Pluto's orbit around the Sun and the researchers estimate that its total iron mass is comparable to that of Mars . A ...