#generalrelativity — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #generalrelativity, aggregated by home.social.
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Tiny black holes may form out of a crystal-like state in spacetime
Microscopic black holes have long hovered at the edge of theory, forming only in exquisitely balanced states. Now…
#NewsBeep #News #Science #Astronomy #AU #Australia #blackholeformation #Choptuikcollapse #Cosmology #criticalcollapse #Einsteingravity #generalrelativity #large-Dexpansion #microscopicblackholes #primordialblackholes #research #SpaceNews #spacetimecrystal #theoreticalphysics
https://www.newsbeep.com/au/689472/ -
Tiny black holes may form out of a crystal-like state in spacetime
Microscopic black holes have long hovered at the edge of theory, forming only in exquisitely balanced states. Now…
#NewsBeep #News #Science #Astronomy #AU #Australia #blackholeformation #Choptuikcollapse #Cosmology #criticalcollapse #Einsteingravity #generalrelativity #large-Dexpansion #microscopicblackholes #primordialblackholes #research #SpaceNews #spacetimecrystal #theoreticalphysics
https://www.newsbeep.com/au/689472/ -
https://www.europesays.com/ie/494923/ A Physical Warp Drive Was Supposed to Be Impossible. Then These Scientists Found a Loophole. #AlcubierreDrive #Éire #GeneralRelativity #IE #Ireland #LightSpeed #MiguelAlcubierre #NegativeEnergy #Physics #Science #Scientists #WarpBubble #WarpDrive #WarpDrives
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A Physical Warp Drive Was Supposed to Be Impossible. Then These Scientists Found a Loophole.
In a surprising paper from 2021, scientists Alexey Bobrick and Gianni Martire suggested that they’d nailed down a…
#NewsBeep #News #Physics #Alcubierredrive #CA #Canada #generalrelativity #lightspeed #MiguelAlcubierre #negativeenergy #Science #scientists #warpbubble #WarpDrive #warpdrives
https://www.newsbeep.com/ca/682764/ -
https://www.europesays.com/uk/974083/ A Physical Warp Drive Was Supposed to Be Impossible. Then These Scientists Found a Loophole. #AlcubierreDrive #GeneralRelativity #LightSpeed #MiguelAlcubierre #NegativeEnergy #Physics #Science #scientists #UK #UnitedKingdom #WarpBubble #WarpDrive #WarpDrives
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A Physical Warp Drive Was Supposed to Be Impossible. Then These Scientists Found a Loophole.
In a surprising paper from 2021, scientists Alexey Bobrick and Gianni Martire suggested that they’d nailed down a…
#NewsBeep #News #Physics #Alcubierredrive #AU #Australia #generalrelativity #LightSpeed #MiguelAlcubierre #negativeenergy #Science #scientists #warpbubble #warpdrive #warpdrives
https://www.newsbeep.com/au/683743/ -
A Physical Warp Drive Was Supposed to Be Impossible. Then These Scientists Found a Loophole.
In a surprising paper from 2021, scientists Alexey Bobrick and Gianni Martire suggested that they’d nailed down a…
#NewsBeep #News #Physics #Alcubierredrive #AU #Australia #generalrelativity #LightSpeed #MiguelAlcubierre #negativeenergy #Science #scientists #warpbubble #warpdrive #warpdrives
https://www.newsbeep.com/au/683743/ -
https://www.europesays.com/ie/492453/ Faint black hole ‘ringing’ provides a sharper test of Einstein’s gravity #Astronomy #astrophysics #BlackHoleMergers #BlackHoles #cosmology #Éire #GeneralRelativity #GravitationalWaves #IE #Ireland #LIGO #Physics #QuasinormalModes #Research #ringdown #Science #SpaceNews #UniversityOfCambridge #Virgo
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"Did you know time can slow down near black holes by up to 30%?
According to Einstein's theory of general relativity, massive objects warp spacetime, causing time dilation near event horizons. This effect is predicted to be extreme, potentially slowing down time by millions of years.
As Einstein said, "Time and space are not independent of each other."
What's the weirdest consequence of time dilation you can think of?
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Weekly Update from the Open Journal of Astrophysics – 16/05/2026
It’s Saturday once again, so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 104 and the total so far published by OJAp up to 552. It took us until late July to pass 100 last year.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter (which nobody should be using); these announcements also show the DOI for each paper.
The first paper to report this week, published on Monday 11th May in the folder High-Energy Astrophysical Phenomena is “Triaxial magnetars as sources of fast radio bursts” by Jonathan I Katz (Washington University, USA). This paper suggests that the mysterious properties of Fast Radio Bursts (FRB) could be explained by triaxial magnetars, with their activity levels influenced by precessional time scales.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116554775791392800
The second paper for this week, published on Tuesday 12th May in the folder Astrophysics of Galaxies, is “The Abundance of Thin Dwarf Galaxies: a Challenge for Cosmological Simulations” by Jose Benavides & Laura V. Sales (UC Riverside, USA), Julio F. Navarro (U. Victoria, Canada), Simon D. M. White (MPA Garching, Germany), and Carlos S. Frenk, Kyle A. Oman & Shaun Cole (U. Durham, UK). Depending on mass up to 40% of galaxies are intrinsically flat, a fraction that numerical models of galaxy formation struggle to reproduce suggesting the models are incomplete.
The overlay for this one is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116560106342500157
Next one up, the third paper of the week, also published on Tuesday 12th May but in the folder Cosmology and Nongalactic Astrophysics is “Cosmological peculiar velocities in general relativity” by Chris Clarkson (Queen Mary, University of London, UK) and Roy Maartens (U. Western Cape, South Africa). This paper refutes claims that the 1+3 covariant approach to cosmological perturbation theory predicts stronger growth of galaxy peculiar velocities, arguing that standard treatments are correct and fully relativistic.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116560224426499932
The fourth paper this week, published on Wednesday May 13th “Possible evidence for a pair-instability supernova nature of ultra-early JWST sources” by Andrea Ferrara & Stefano Carniani (Scuola Normale Superiore, Pisa, Italy), Takahiro Morishita (California Institute of Technology, USA), and Massimo Stiavelli (Space Telescope Science Institute, USA). Published in the section Astrophysics of Galaxies. This paper argues that recent observations challenge early galaxy formation models, suggesting that the bright source, Capotauro, could be a supernova from a massive, metal-free star, not a luminous galaxy as initially thought.
The overlay is here:
The officially accepted version can be found on arXiv here and here is the Mastodon announcement:
https://fediscience.org/@OJ_Astro/116566147448743997
The fifth and final article of this week was also published on Wednesday 13th May but in the folder Cosmology and Nongalactic Astrophysics. The title is “Evolving and interacting dark energy: photometric and spectroscopic synergy with DES Y3 and DESI DR2” and it is by Maria Tsedrik and Benjamin Bose (University of Edinburgh, UK). The study investigates the Dark Scattering interacting dark energy scenario, using data from various sources. Results show no evidence of dark-sector interaction and a preference for the Chevallier-Polarski-Linder parametrisation.
The overlay is here:
You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116566165139100860
And that concludes this week’s update. I’ll do another next Saturday.
#arXiv251211035v3 #arXiv260104953v3 #arXiv260107374v3 #arXiv260314511v2 #AstrophysicsOfGalaxies #Capotauro #ChevallierPolarskiLinder #cosmicShear #cosmologicalSimulations #CosmologyAndNonGalacticAstrophysics #DarkEnergy #DarkEnergySpectroscopicInstrument #DarkEnergySurvey #DarkScattering #DiamondOpenAccess #DiamondOpenAccessPublishing #dwarfGalaxies #fastRadioBursts #galaxyFormation #generalRelativity #HighEnergyAstrophysicalPhenomena #JWST #Magnetars #OpenAccess #OpenAccessPublishing #peculiarVelocities #supernova -
Weekly Update from the Open Journal of Astrophysics – 16/05/2026
It’s Saturday once again, so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 104 and the total so far published by OJAp up to 552. It took us until late July to pass 100 last year.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter (which nobody should be using); these announcements also show the DOI for each paper.
The first paper to report this week, published on Monday 11th May in the folder High-Energy Astrophysical Phenomena is “Triaxial magnetars as sources of fast radio bursts” by Jonathan I Katz (Washington University, USA). This paper suggests that the mysterious properties of Fast Radio Bursts (FRB) could be explained by triaxial magnetars, with their activity levels influenced by precessional time scales.
The overlay for this paper is here
You can find the officially accepted version on arXiv here and the announcement on Fediverse here:
https://fediscience.org/@OJ_Astro/116554775791392800
The second paper for this week, published on Tuesday 12th May in the folder Astrophysics of Galaxies, is “The Abundance of Thin Dwarf Galaxies: a Challenge for Cosmological Simulations” by Jose Benavides & Laura V. Sales (UC Riverside, USA), Julio F. Navarro (U. Victoria, Canada), Simon D. M. White (MPA Garching, Germany), and Carlos S. Frenk, Kyle A. Oman & Shaun Cole (U. Durham, UK). Depending on mass up to 40% of galaxies are intrinsically flat, a fraction that numerical models of galaxy formation struggle to reproduce suggesting the models are incomplete.
The overlay for this one is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
https://fediscience.org/@OJ_Astro/116560106342500157
Next one up, the third paper of the week, also published on Tuesday 12th May but in the folder Cosmology and Nongalactic Astrophysics is “Cosmological peculiar velocities in general relativity” by Chris Clarkson (Queen Mary, University of London, UK) and Roy Maartens (U. Western Cape, South Africa). This paper refutes claims that the 1+3 covariant approach to cosmological perturbation theory predicts stronger growth of galaxy peculiar velocities, arguing that standard treatments are correct and fully relativistic.
The overlay for this one is here:
The final, accepted version can be found on arXiv here and the Mastodon announcement is here:
https://fediscience.org/@OJ_Astro/116560224426499932
The fourth paper this week, published on Wednesday May 13th “Possible evidence for a pair-instability supernova nature of ultra-early JWST sources” by Andrea Ferrara & Stefano Carniani (Scuola Normale Superiore, Pisa, Italy), Takahiro Morishita (California Institute of Technology, USA), and Massimo Stiavelli (Space Telescope Science Institute, USA). Published in the section Astrophysics of Galaxies. This paper argues that recent observations challenge early galaxy formation models, suggesting that the bright source, Capotauro, could be a supernova from a massive, metal-free star, not a luminous galaxy as initially thought.
The overlay is here:
The officially accepted version can be found on arXiv here and here is the Mastodon announcement:
https://fediscience.org/@OJ_Astro/116566147448743997
The fifth and final article of this week was also published on Wednesday 13th May but in the folder Cosmology and Nongalactic Astrophysics. The title is “Evolving and interacting dark energy: photometric and spectroscopic synergy with DES Y3 and DESI DR2” and it is by Maria Tsedrik and Benjamin Bose (University of Edinburgh, UK). The study investigates the Dark Scattering interacting dark energy scenario, using data from various sources. Results show no evidence of dark-sector interaction and a preference for the Chevallier-Polarski-Linder parametrisation.
The overlay is here:
You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:
https://fediscience.org/@OJ_Astro/116566165139100860
And that concludes this week’s update. I’ll do another next Saturday.
#arXiv251211035v3 #arXiv260104953v3 #arXiv260107374v3 #arXiv260314511v2 #AstrophysicsOfGalaxies #Capotauro #ChevallierPolarskiLinder #cosmicShear #cosmologicalSimulations #CosmologyAndNonGalacticAstrophysics #DarkEnergy #DarkEnergySpectroscopicInstrument #DarkEnergySurvey #DarkScattering #DiamondOpenAccess #DiamondOpenAccessPublishing #dwarfGalaxies #fastRadioBursts #galaxyFormation #generalRelativity #HighEnergyAstrophysicalPhenomena #JWST #Magnetars #OpenAccess #OpenAccessPublishing #peculiarVelocities #supernova -
Darkness Can Move Faster Than Light Without Breaking the Laws of Physics
Artistic depiction of the darkness measurement. Image not to scale. Physicists have experimentally confirmed a strange prediction: the…
#NewsBeep #News #Physics #CA #Canada #darkness #generalrelativity #relativity #Science #speedoflight
https://www.newsbeep.com/ca/649634/ -
Darkness Can Move Faster Than Light Without Breaking the Laws of Physics
Artistic depiction of the darkness measurement. Image not to scale. Physicists have experimentally confirmed a strange prediction: the…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #darkness #GeneralRelativity #Relativity #Science #speedoflight
https://www.newsbeep.com/us/625064/ -
Darkness Can Move Faster Than Light Without Breaking the Laws of Physics
Artistic depiction of the darkness measurement. Image not to scale. Physicists have experimentally confirmed a strange prediction: the…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #darkness #GeneralRelativity #Relativity #Science #speedoflight
https://www.newsbeep.com/us/625064/ -
https://www.europesays.com/ie/469668/ Darkness Can Move Faster Than Light Without Breaking the Laws of Physics #DARKNESS #Éire #GeneralRelativity #IE #Ireland #Physics #relativity #Science #SpeedOfLight
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https://www.europesays.com/uk/939311/ Darkness Can Move Faster Than Light Without Breaking the Laws of Physics #darkness #GeneralRelativity #Physics #Relativity #Science #SpeedOfLight #UK #UnitedKingdom
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What is quantum gravity? Scientists think it could explain the beginning of our universe
When you buy through links on our articles, Future and its syndication partners may earn a commission. An…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #Einstein'stheory #GeneralRelativity #gravity #NiayeshAfshordi #QuantumGravity #QuantumPhysics #Science #theBigBang #TheUniverse #theory
https://www.newsbeep.com/us/618883/ -
What is quantum gravity? Scientists think it could explain the beginning of our universe
When you buy through links on our articles, Future and its syndication partners may earn a commission. An…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #Einstein'stheory #GeneralRelativity #gravity #NiayeshAfshordi #QuantumGravity #QuantumPhysics #Science #theBigBang #TheUniverse #theory
https://www.newsbeep.com/us/618883/ -
My #paperOfTheDay was "Galilei invariance, action-reaction principle, and center of mass theorem" from 1983.
This is an article about #generalRelativity , without anything quantum. From daily experience, we know that every object has a mass, but thinking more closely, the parameter we call mass actually appears in different ways in #physics, and it is not a priory clear how they are logically related. Einstein's famous thought experiment was about the "falling elevator", that is, if you are in a box and can't look outside, you can not distinguish whether you fall freely, or you are located far away from a planet where there is no gravitational field. This "weak equivalence principle" asserts the equivalence between "inertial mass", the parameter which determines how hard it is to accelerate something, and "passive gravitational mass", the parameter that determines how strongly a gravitational field acts on an object.
But there is a third type of mass, the "active gravitational mass", which determines how much gravitational field is generated by an object. The "strong equivalence principle" asserts that all three masses are the same.
The present article demonstrates that, as far as classical celestial mechanics is concerned, the strong equivalence principle can not been distinguished from the weak one. That is, the observed motion of celestial bodies can already be explained by the weak equivalence principle, regardless of whether the strong one holds or not.
I don't know what the current state of affairs is in that question, in particular regarding quantum theory.
https://link.springer.com/article/10.1007/BF01889417 -
Discover whether Einstein’s theory of relativity can fully explain black hole singularities, where gravity becomes infinite, or if quantum physics is needed to solve the mystery.
#EinsteinRelativity #BlackHoleSingularity #QuantumGravity #GeneralRelativity #UniverseSecrets
https://www.scientificworldinfo.com/2026/04/can-relativity-explain-black-hole-singularities.html -
Gravity holds across cosmos, proving Newton and Einstein right
Scientists have tested gravity across some of the largest structures in the universe and found that it behaves…
#NewsBeep #News #Physics #Astrophysics #AtacamaCosmologyTelescope #CA #Canada #Cosmology #darkmatter #Galaxyclusters #generalrelativity #gravity #Science #universe
https://www.newsbeep.com/ca/609261/ -
https://www.europesays.com/uk/899205/ Gravity holds across cosmos, proving Newton and Einstein right #Astrophysics #AtacamaCosmologyTelescope #Cosmology #DarkMatter #GalaxyClusters #GeneralRelativity #gravity #Physics #Science #UK #UnitedKingdom #Universe
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Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
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Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
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Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
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Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
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Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
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New Theory Says We’ve Been Overcomplicating the Big Bang
One of the greatest unsolved problems in physics concerns unifying quantum mechanics and general relativity—two equally successful theories…
#NewsBeep #News #Physics #AU #Australia #BigBang #Cosmology #generalrelativity #QuantumGravity #Science
https://www.newsbeep.com/au/581642/ -
New Theory Says We’ve Been Overcomplicating the Big Bang
One of the greatest unsolved problems in physics concerns unifying quantum mechanics and general relativity—two equally successful theories…
#NewsBeep #News #Physics #AU #Australia #BigBang #Cosmology #generalrelativity #QuantumGravity #Science
https://www.newsbeep.com/au/581642/ -
New Theory Says We’ve Been Overcomplicating the Big Bang
One of the greatest unsolved problems in physics concerns unifying quantum mechanics and general relativity—two equally successful theories…
#NewsBeep #News #Physics #BigBang #Cosmology #generalrelativity #QuantumGravity #Science #UK #UnitedKingdom
https://www.newsbeep.com/uk/509701/ -
https://www.europesays.com/ie/417363/ New Theory Says We’ve Been Overcomplicating the Big Bang #BigBang #cosmology #Éire #GeneralRelativity #IE #Ireland #Physics #QuantumGravity #Science
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The physics of no return: What actually happens if you get pulled into a black hole
In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used…
#NewsBeep #News #Physics #accretiondisk #astrophysicsexplainer #Blackholes #eventhorizon #generalrelativity #gravitationalwaves #Hawkingradiation #research #Science #singularity #SpaceNews #spaghettification #timedilation #UK #UnitedKingdom
https://www.newsbeep.com/uk/502546/ -
https://www.europesays.com/uk/859214/ The physics of no return: What actually happens if you get pulled into a black hole #AccretionDisk #AstrophysicsExplainer #BlackHoles #EventHorizon #GeneralRelativity #GravitationalWaves #HawkingRadiation #Physics #Research #Science #Singularity #SpaceNews #spaghettification #TimeDilation #UK #UnitedKingdom
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https://www.europesays.com/ie/410639/ The physics of no return: What actually happens if you get pulled into a black hole #AccretionDisk #AstrophysicsExplainer #BlackHoles #Éire #EventHorizon #GeneralRelativity #GravitationalWaves #HawkingRadiation #IE #Ireland #Physics #Research #Science #singularity #SpaceNews #spaghettification #TimeDilation
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The physics of no return: What actually happens if you get pulled into a black hole
In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used…
#UnitedStates #US #USA #accretiondisk #america #astrophysicsexplainer #blackholes #EventHorizon #generalrelativity #gravitationalwaves #Hawkingradiation #research #science #Singularity #spacenews #spaghettification #technology #timedilation #unitedstatesofamerica
https://www.europesays.com/2882082/ -
https://www.europesays.com/uk/857323/ Distance in space is an illusion #AdSCFTCorrespondence #Astronomy #Astrophysics #DistanceInSpace #Einstein #EREqualsEPR #GeneralRelativity #HolographicPrinciple #JuanMaldacena #LoopQuantumGravity #Physics #QuantumEntanglement #Research #Science #SpaceNews #SpacetimeCurvature #SpecialRelativity #UK #UnitedKingdom
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Distance in space is an illusion
Andromeda sounds far away because 2.5 million light-years sounds far away. It lands with authority. It fe…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #AdSCFTcorrespondence #Astronomy #Astrophysics #distanceinspace #Einstein #ERequalsEPR #GeneralRelativity #holographicprinciple #JuanMaldacena #loopquantumgravity #QuantumEntanglement #Research #Science #SpaceNews #spacetimecurvature #specialrelativity
https://www.newsbeep.com/us/551357/ -
Distance in space is an illusion
Andromeda sounds far away because 2.5 million light-years sounds far away. It lands with authority. It fe…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #AdSCFTcorrespondence #Astronomy #Astrophysics #distanceinspace #Einstein #ERequalsEPR #GeneralRelativity #holographicprinciple #JuanMaldacena #loopquantumgravity #QuantumEntanglement #Research #Science #SpaceNews #spacetimecurvature #specialrelativity
https://www.newsbeep.com/us/551357/ -
https://www.europesays.com/ie/408924/ Distance in space is an illusion #AdSCFTCorrespondence #Astronomy #astrophysics #DistanceInSpace #Einstein #Éire #EREqualsEPR #GeneralRelativity #HolographicPrinciple #IE #Ireland #JuanMaldacena #LoopQuantumGravity #QuantumEntanglement #Research #Science #Space #SpaceNews #SpacetimeCurvature #SpecialRelativity
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We spent six weeks computationally analyzing the Rodal (2025) warp drive metric, the latest attempt to build a warp bubble without exotic matter. The result is a definitive negative, but the reason why is more interesting than "it doesn't work."
The irrotational construction reduces violations by 37x vs Alcubierre. But observer-robust analysis shows it hides violations across 45% of the domain that comoving observers never see.
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We spent six weeks computationally analyzing the Rodal (2025) warp drive metric, the latest attempt to build a warp bubble without exotic matter. The result is a definitive negative, but the reason why is more interesting than "it doesn't work."
The irrotational construction reduces violations by 37x vs Alcubierre. But observer-robust analysis shows it hides violations across 45% of the domain that comoving observers never see.
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We spent six weeks computationally analyzing the Rodal (2025) warp drive metric, the latest attempt to build a warp bubble without exotic matter. The result is a definitive negative, but the reason why is more interesting than "it doesn't work."
The irrotational construction reduces violations by 37x vs Alcubierre. But observer-robust analysis shows it hides violations across 45% of the domain that comoving observers never see.
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We spent six weeks computationally analyzing the Rodal (2025) warp drive metric, the latest attempt to build a warp bubble without exotic matter. The result is a definitive negative, but the reason why is more interesting than "it doesn't work."
The irrotational construction reduces violations by 37x vs Alcubierre. But observer-robust analysis shows it hides violations across 45% of the domain that comoving observers never see.
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1/n Notes on #UAP Discussions : This particular exploration is a milestone. If we map what they eventually wind up talking about to vexing questions in current #Physics we have a direct confrontation with #GeneralRelativity, #QuantumMechanics, and the applied mass- energy firewall problem that lies at at the heart of several open problems in #Cosmology and the SM. It should be noted that the intuition of #Engineers in this case is capable of beating #Physicists to the punch.
There is a bit… -
This is way above my pay grade, and I've only read the article, not the actual technical work underneath it (because my maths is insufficient to know what it's talking about, so there's not a lot of point). But it sounds really interesting.
I've never heard of "observer patch holography" (note typo in slug text), but a theoretical framework which has just a single free variable but lets you derive general relativity and the standard model, correctly predicting a bunch of magic numbers that we input as free variables into the standard model, is interesting as hell.
Maybe someone smarter than me has already looked at this and debunked it. Sabine doesn't seem to have done a video on it (or I missed it). And "one guy with four information theory axioms solves all of physics' problems" is definitely on the Hollywood-script end of the plausibility scale, but who knows? Weirder things have happened.
@cenobyte - thought of you, of course.
#StandardModel #physics #GeneralRelativity #GR #ObserverPatchHolography #OPH #quantum
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Today's #paperOfTheDay is "Why there is Nothing rather than something: A theory of the cosmological constant" from 1988. Like yesterday's paper, it deals with the intersection between quantum field theory and #generalRelativity, but the 30 years between them clearly show. Coleman's 1988 paper is an argument in the style of that time (which structurally is quite similar to much of the older #renormalon literature): Heuristic manipulations of formal objects such as the wave function of the universe, or divergent sums over all spacetime geometries. The outcome of this argument is that if #wormholes exist (caused by quantum effects at a scale that is much smaller than observations, but larger than the Planck scale), they can drive the cosmological constant to zero in an Euclidean path integral formulation of general relativity. As always with Coleman, the language is quite funny and frank about the paper's limitations: He writes "Although I find this theory in many ways very attractive, I must honestly stress its speculative character. It rests on wormhole dynamics and the Euclidean formulation of quantum gravity. This is doubly a house built on sand. [...] the Euclideon formulation of gravity is not a subject with firm foundations and clear rules of procedure; indeed, it is more like a trackless swamp". Observations like these have by now, 30 years later, led to a style of theoretical physics that is much more systematic and mathematical than in the 1980s, but also sometimes less intuitive. #dailyPaperChallenge https://doi.org/10.1016%2F0550-3213(88)90097-1
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`The Lense-Thirring effect, a prediction of general relativity, implies that massive rotating objects like Earth can slightly "drag" spacetime, which could affect the pendulum's oscillation. This effect, though theoretically significant, is currently too small to measure with a Foucault pendulum.`
https://en.wikipedia.org/wiki/Foucault_pendulum#Absolute_reference_frame_for_pendulum
#physics #Foucault #pendulum #FoucaultPendulum #Earth #rotation #relativity #generalRelativity #Einstein
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`The Lense-Thirring effect, a prediction of general relativity, implies that massive rotating objects like Earth can slightly "drag" spacetime, which could affect the pendulum's oscillation. This effect, though theoretically significant, is currently too small to measure with a Foucault pendulum.`
https://en.wikipedia.org/wiki/Foucault_pendulum#Absolute_reference_frame_for_pendulum
#physics #Foucault #pendulum #FoucaultPendulum #Earth #rotation #relativity #generalRelativity #Einstein
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`The Lense-Thirring effect, a prediction of general relativity, implies that massive rotating objects like Earth can slightly "drag" spacetime, which could affect the pendulum's oscillation. This effect, though theoretically significant, is currently too small to measure with a Foucault pendulum.`
https://en.wikipedia.org/wiki/Foucault_pendulum#Absolute_reference_frame_for_pendulum
#physics #Foucault #pendulum #FoucaultPendulum #Earth #rotation #relativity #generalRelativity #Einstein
-
`The Lense-Thirring effect, a prediction of general relativity, implies that massive rotating objects like Earth can slightly "drag" spacetime, which could affect the pendulum's oscillation. This effect, though theoretically significant, is currently too small to measure with a Foucault pendulum.`
https://en.wikipedia.org/wiki/Foucault_pendulum#Absolute_reference_frame_for_pendulum
#physics #Foucault #pendulum #FoucaultPendulum #Earth #rotation #relativity #generalRelativity #Einstein