Tag

Gravity

All articles tagged with #gravity

science23 minutes ago•36 min saved

Deep-Earth Phase Shift Behind Mysterious Gravity Glitches

NASA/DLR GRACE data showed a deep mantle gravity anomaly from 2006–2008 stretching across the eastern Atlantic. Scientists traced the signal to a phase transition in bridgmanite near the core–mantle boundary, where mineral structure changes redistribute mass and alter density. This deep-seated gravitational anomaly, not fully explained by surface water, helps explain previous geomagnetic-field–related gravity fluctuations and will guide models of core–mantle dynamics and mantle convection.

via Yahoo|

#bridgmanite #core-mantle-boundary #grace

science2 days ago•56 min saved

Antarctica’s Subtle Gravity Dip Unveils a 70-Million-Year Deep-Earth Tale

A new study using seismic data and mantle-flow modeling shows Antarctica hides a large, persistent gravity low called the Antarctic Geoid Low. Reconstructing roughly 70 million years of mantle motion, researchers find this gravity feature is not a transient anomaly but a long-lived imprint of deep-Earth dynamics that intensified around 34 million years ago as Antarctica became permanently ice-covered. While it’s not a literal hole, the gravity dip reveals how mass is distributed deep inside Earth and could subtly influence regional sea levels, underscoring how slow, deep-earth processes reshape the planet’s gravity field over geological time.

via Space|

#antarctic-geoid-low #deep-earth #gravity

science7 days ago•56 min saved

Gravity on the gut: a new theory linking IBS to gravity tolerance

A Cedars-Sinai doctor advances a novel “gravity intolerance” theory suggesting IBS risk may hinge on how the body tolerates gravity. Using a framework called the G-force cube (resistance, detection, vigilance), he argues gravity-related factors could unify IBS with related conditions like anxiety, pain sensitivity (fibromyalgia), and POTS. The idea is preliminary and not a replacement for established IBS factors (bacteria, inflammation, diet, genetics); more research is needed, but gravity may help organize known risk factors and guide future study.

via Space|

#gastroenterology #gravity #gut-brain-axis

space21 days ago•80 min saved

Infrared-running gravity hints a gravity-based path to galaxy rotation without dark matter

A Space.com article reports a new theory by Naman Kumar proposing infrared-running gravity, a scale-dependent modification of gravity that could explain galaxy rotation curves without invoking dark matter while remaining compatible with early-universe constraints; however, the approach is not yet a full replacement for dark matter in cosmology, and further work is needed to compare its predictions with gravitational lensing and galaxy-cluster observations.

via Space|

#dark-matter #galaxy-rotation #gravitational-lensing

science1 month ago•4 min saved

Gravity Emerges from Quantum Entropy: A Bold Entropic View of the Universe

A new theory proposes gravity is not fundamental but emerges from entropy, specifically quantum relative entropy, with spacetime acting as a quantum operator and a G-field linking matter and geometry. The approach aims to reconcile general relativity and quantum mechanics, potentially offering a fresh view on dark matter and the cosmological constant, though the idea remains unproven.

via The Daily Galaxy|

#dark-matter #entropic-gravity #gravity

science1 month ago•37 min saved

Entropy Could Be Gravity’s Hidden Origin, Pointing Toward Quantum Gravity

A new theory by physicist Ginestra Bianconi suggests gravity may emerge from entropy, potentially reconciling Einstein’s general relativity with quantum theory. By treating spacetime as a quantum operator and describing an entropic action that couples matter to geometry through a G-field, the framework aims to yield a small cosmological constant and offer a candidate explanation for dark matter. While intriguing, the idea remains speculative and requires substantial further work to confirm its viability as a unified theory of physics.

via Yahoo News Canada|

#dark-matter #entropy #gravity

science1 month ago•11 min saved

Graviton trap aims to witness gravity's quantum particle

Scientists at Stevens Institute of Technology and Yale University are launching the world’s first experiment to detect gravitons, using a centimeter-scale resonator filled with superfluid helium cooled to its quantum ground state. A passing gravitational wave should impart energy that becomes a single graviton, converted into a phonon and read out with precision lasers. By scaling the detector from gram-scale to larger detectors, the team hopes to observe gravitons directly and bridge General Relativity with Quantum Mechanics, backed by the Keck Foundation.

via Interesting Engineering|

#graviton #gravity #quantum-mechanics

entertainment1 month ago•9 min saved

No Gravity Collapse: Debunking the Viral 'Gravity Ends' Claim

Lifehacker debunks a viral claim that gravity will stop for seven seconds on August 12, 2026, noting there’s no secret NASA document or project called 'Anchor.' Cosmologist Joel Meyers explains you’d mostly float rather than slam into ceilings, gravity isn’t what binds our bodies, and the planet wouldn’t instantly explode; atmospheric and tectonic effects would be complex and unpredictable. The article also explains why the rumor spread, what would realistically happen, and even a tongue-in-cheek survival plan, ultimately concluding the event is extremely unlikely.

via Lifehacker|

#conspiracy-theories #debunking #entertainment

science1 month ago•77 min saved

Mars helps stabilize Earth's climate by taming its tilt, new simulations suggest

New simulations quantify Mars' gravitational influence on Earth, showing Mars helps stabilize Earth's axial tilt and orbital eccentricity over Milankovitch cycles, potentially shaping climate over hundreds of thousands to millions of years; removing Mars from the system causes major cycles to vanish, while increasing Mars' mass dampens tilt changes, suggesting Mars plays a stabilizing role in Earth's climate and could influence how we think about habitable worlds elsewhere.

via Space|

#earth-climate #gravity #mars

science1 month ago•34 min saved

Cosmic Acceleration Reinterpreted: Finsler Gravity Challenges Dark Energy

A German team proposes that dark energy may not be necessary if gravity is described by Finsler geometry, an anisotropic modification to gravity that can reproduce the universe’s accelerating expansion without dark energy; the study presents an intriguing alternative to the standard model, but it does not definitively overturn dark energy and further research is needed to test these ideas.

via Yahoo|

#cosmology #dark-energy #finsler-gravity

science-and-technology1 month ago•75 min saved

NASA debunks seven-second gravity loss rumors for August 12, 2026

A viral claim that Earth will briefly lose gravity for seven seconds on August 12, 2026 is false. NASA says gravity is determined by Earth's mass and cannot vanish without a mass change; a total solar eclipse will occur that day but it will not affect gravity. The rumor traces to a dubious post and there’s no credible evidence supporting it.

via Tribune India|

#earth #gravity #hoax

science1 month ago•33 min saved

Ultra-Low-Acceleration Gravity: New Study Sparks MOND Possibilities

A Gaia-based study of 26,500 wide binary stars within 650 light-years finds that at ultra-low accelerations (~0.1 nm/s^2) observed accelerations exceed Newton-Einstein predictions by about 30–40%, while at higher accelerations (~10 nm/s^2) the data align with standard gravity. The results could be explained by Modified Newtonian Dynamics (MOND) and the AQUAL formulation, offering potential evidence for gravity behavior beyond the classical model, though MOND remains a theory and further observations are needed amid ongoing dark-matter explanations.

via Yahoo News Canada|

#aqual #gravity #modified-newtonian-dynamics

science1 month ago•5 min saved

Ghostly Vacuum Signals Could Redefine Gravity

A theoretical study suggests Cherenkov radiation in empty space could arise from a negative-energy ghost instability, uniting two seemingly different phenomena and offering a potential window into modified gravity; if true, the vacuum would have structure and stored energy, but the idea remains purely theoretical with no practical detection method yet.

via ScienceAlert|

#cherenkov-radiation #cosmology #gravity

science3 months ago•7 min saved

Dark Matter Follows Gravity, Challenging the 5th Fundamental Force

Scientists have confirmed that dark matter obeys gravity on large scales, which constrains the possibility of a fifth fundamental force in the universe, though it cannot be completely ruled out if it is weaker than 7% of gravity. This discovery helps refine our understanding of dark matter's behavior and limits the strength of any unknown forces acting upon it.

via Space|

#cosmology #dark-matter #fifth-force

science4 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