Tag

Event Horizon

All articles tagged with #event horizon

science-space1 month ago•11 min saved

Time Slows to a Standstill at Black Hole Edges, Then Crosses the Horizon

Black holes warp time as well as space: near the event horizon, a distant observer sees infalling matter slow and freeze at the edge due to gravitational time dilation, while the object itself experiences finite proper time to cross the horizon. This freezing is a coordinate effect, not a literal halt in the falling object’s reality. Gravitational time dilation has been measured on Earth and in GPS systems, confirming relativity beyond black holes. Observations like the Event Horizon Telescope and LIGO support horizon physics but do not show a literal frozen image, and quantum-gravity effects (e.g., Hawking radiation) remain unobserved and unresolved.

via Space Daily|

#black-hole #event-horizon #general-relativity

science1 month ago•121 min saved

Direct-wave signal near a black hole horizon opens a new window on gravity

Researchers analyzed a very strong gravitational-wave event (GW250114) detected by LIGO on Jan. 14, 2025 and found evidence of a “direct wave” produced from near the horizon of the newly formed black hole. The signal, matching theoretical predictions, could allow astronomers to study the region just outside the event horizon using gravitational waves, potentially testing general relativity and informing ideas about quantum gravity and the black hole information paradox. However, the claim rests on a single observation, so further detections are needed to confirm this as a universal feature of black hole mergers.

via Live Science|

#black-holes #event-horizon #gravitational-waves

science1 month ago•53 min saved

Listening to the Horizon: Gravitational Waves Hint at Black Hole’s Edge

Physicists analyzing the GW250114 black hole merger found a ‘direct wave’ signal consistent with dynamics very close to the horizon, suggesting gravitational waves could offer a new way to study the region just outside a black hole and test general relativity—though more events are needed to confirm the finding.

via Yahoo|

#black-hole #event-horizon #gravitational-waves

science1 month ago•15 min saved

Direct waves from the loudest GW reveal a black hole’s horizon spin and gravity

The January 14, 2025 gravitational-wave event GW250114 was the loudest yet and contained a previously unread signal, the direct wave, emitted from just outside the remnant black hole’s horizon. By decoding this signal, researchers measured the horizon’s rotation frequency and surface gravity, finding results that match Kerr black-hole predictions and enabling horizon-focused tests of general relativity. This marks a new era of direct horizon metrology in gravitational-wave astronomy as detector sensitivity improves.

via Space Daily|

#black-holes #event-horizon #gravitational-waves

science1 month ago•49 min saved

Loudest Black-Hole Merger Sheds Light on Event Horizons

Scientists analyzed GW250114—the loudest binary black-hole gravitational-wave signal observed to date, from a merger of two ~32-solar-mass black holes detected by LIGO, Virgo, and KAGRA. They identified a direct-waves component near the horizon and used it to measure the remnant black hole’s rotation and surface gravity, offering a new way to study event horizons and test general relativity in the extreme gravity regime.

via Yahoo|

#black-hole #event-horizon #general-relativity

space1 month ago•97 min saved

Loudest Gravitational-Wave Burst Maps Black Hole Event Horizon

Researchers analyzing GW250114—the loudest binary black hole merger detected by LIGO, Virgo, and KAGRA—identified a new component called direct waves and used it to probe the remnant black hole's horizon, measuring its rotation frequency and surface gravity; the work, published in Nature, could enable future tests of general relativity and deepen our understanding of what happens at a black hole's edge.

via Space|

#black-holes #event-horizon #gravitational-waves

science2 months ago•8 min saved

Direct-wave signal edges closer to unveiling a black hole’s event horizon

A new, unusually clear gravitational-wave signal from a black-hole merger (GW250114) may carry the long-theorized direct-wave signature, offering a rare observational probe of the region near a black hole’s event horizon and enabling measurements of horizon rotation; if confirmed, this could open a new way to test general relativity and study near-horizon physics, though additional data and verification are needed.

via ScienceAlert|

#black-hole #direct-wave #event-horizon

science8 months ago•19 min saved

Revolutionary Theory Challenges 60-Year Black Hole Paradigm

A new theory questions the traditional view of black holes, suggesting they may never fully form but only approach their event horizons asymptotically, which resolves longstanding paradoxes and emphasizes the importance of causal structure in observations.

via SciTechDaily|

#black-holes #event-horizon #general-relativity

science9 months ago•5 min saved

Are Singularities Necessary in Black Holes?

Some theories suggest black holes might not have singularities or even event horizons, with models like the Hayward metric proposing non-singular, horizonless black holes that align with current observations, challenging traditional views based on general relativity and quantum physics.

via Phys.org|

#black-holes #event-horizon #hayward-metric

science10 months ago•5 min saved

The Fate of Matter Inside a Black Hole

Black holes are formed from collapsing massive stars, creating a region with an event horizon beyond which nothing can escape, and possibly a singularity where matter is compressed infinitely. They influence their surroundings through accretion disks and jets, distort time and space, and may eventually evaporate via Hawking radiation, playing a crucial role in understanding the universe's fundamental laws.

via Yahoo|

#black-holes #event-horizon #gravity

science10 months ago•3 min saved

Lab Simulation of Black Hole Emits Glow

Physicists simulated a black hole in the lab using a chain of atoms, observing Hawking radiation-like effects, which could provide insights into the unification of quantum mechanics and general relativity and help understand black hole phenomena.

via ScienceAlert|

#black-hole #event-horizon #hawking-radiation

science11 months ago•5 min saved

Are We Inside a Black Hole?

Some scientists speculate that our universe might exist inside a black hole due to the mathematical similarities between the two, but current observations of the universe's uniformity and lack of directional bias challenge this idea, and further research into quantum gravity is needed to explore this possibility.

via National Geographic|

#black-holes #cosmology #event-horizon

science11 months ago•5 min saved

Are We Inside a Black Hole?

Some scientists speculate that our universe might exist inside a black hole due to similarities in their mathematical descriptions, but observational evidence like the universe's uniformity challenges this idea, and a complete theory of quantum gravity is needed to explore this possibility further.

via yahoo.com|

#black-holes #cosmology #event-horizon

science1 year ago•2 min saved

Exploring Black Holes: The Universe's Most Mysterious Monsters

Black holes form from collapsing massive stars and have a strong gravitational pull, but their influence is limited to nearby objects. They do not actively suck in matter from afar, and the universe's expansion and black hole evaporation prevent them from consuming the entire universe. Therefore, black holes are not a threat to the universe as a whole.

via WION|

#black-holes #cosmic-expansion #event-horizon

science1 year ago•4 min saved

What Happens When You Cross the Black Hole's Point of No Return?

Black holes are dense cosmic objects with a point of no return called the event horizon, beyond which nothing can escape, leading to extreme effects like spaghettification and time dilation; their study offers insights into fundamental physics despite the dangers of falling into one.

via WION|

#black-holes #event-horizon #gravitational-pull