#black_hole — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #black_hole, aggregated by home.social.
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A phase transition of spacetime at the edge of a black hole.
A phase transition is a special state of an object. For decades, physicists suspected that something similar could happen to spacetime, to the very structure of the universe, organizing itself into a crystalline structure just on the threshold of becoming a black hole.
If the energy of the infalling shell of particles is adjusted to a critical threshold—the boundary between "collapse into a black hole" and "safe dissipation"—the resulting spacetime doesn't simply remain quiescent. It pulsates, oscillating with a precise, repeating rhythm, with discrete self-similarity, as if spacetime itself were a crystal with a regular lattice structure. Physicists called this state "critical collapse" and almost immediately realized that it had the hallmarks of a phase transition.
Moreover, the equations describing spacetime near the edge of a black hole are far from simple. The equations of general relativity in four dimensions resist simplification. But what if we increase the number of dimensions? Not to five or forty-two, but straight to infinity. As Christian Ecker of Goethe University Frankfurt notes, in principle, nothing prevents us from writing the equations for any number of dimensions—five, forty-two, or an infinite number. The equations in this limit, surprisingly, reduce to something much more manageable. The four-dimensional problem, reformulated as the limit in an infinite number of dimensions of a more general theory, lends itself to analytical methods that were simply not available before. In this limit, a whole family of exact solutions has been discovered—an infinite catalog of spacetime crystal configurations, each characterized by a single time function encoding the repeating rhythm of the structure.https://journals.aps.org/prl/abstract/10.1103/qgl5-5l3t
#science #science_news #physics #self-organization #black_hole #phase_transition #phase_transitions #astronomy #cosmology
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A phase transition of spacetime at the edge of a black hole.
A phase transition is a special state of an object. For decades, physicists suspected that something similar could happen to spacetime, to the very structure of the universe, organizing itself into a crystalline structure just on the threshold of becoming a black hole.
If the energy of the infalling shell of particles is adjusted to a critical threshold—the boundary between "collapse into a black hole" and "safe dissipation"—the resulting spacetime doesn't simply remain quiescent. It pulsates, oscillating with a precise, repeating rhythm, with discrete self-similarity, as if spacetime itself were a crystal with a regular lattice structure. Physicists called this state "critical collapse" and almost immediately realized that it had the hallmarks of a phase transition.
Moreover, the equations describing spacetime near the edge of a black hole are far from simple. The equations of general relativity in four dimensions resist simplification. But what if we increase the number of dimensions? Not to five or forty-two, but straight to infinity. As Christian Ecker of Goethe University Frankfurt notes, in principle, nothing prevents us from writing the equations for any number of dimensions—five, forty-two, or an infinite number. The equations in this limit, surprisingly, reduce to something much more manageable. The four-dimensional problem, reformulated as the limit in an infinite number of dimensions of a more general theory, lends itself to analytical methods that were simply not available before. In this limit, a whole family of exact solutions has been discovered—an infinite catalog of spacetime crystal configurations, each characterized by a single time function encoding the repeating rhythm of the structure.https://journals.aps.org/prl/abstract/10.1103/qgl5-5l3t
#science #science_news #physics #self-organization #black_hole #phase_transition #phase_transitions #astronomy #cosmology
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#1girl #acheron_(honkai:_star_rail) #asymmetrical_footwear #bare_shoulders #black_choker #black_gloves #black_hole #black_shorts #boots #choker #closed_eyes #coat #coattails #colored_extremities #commentary #detached_sleeves #gloves #hair_over_one_eye #high_heels #highres #holding #holding_sword #holding_weapon #honkai:_star_rail #honkai_(series) #long_hair #purple_hair #raikoart #red_hands #shorts #signature #solo #squatting #sword #thigh_boots #water #weapon #white_coat https://danbooru.donmai.us/posts/8228416
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Astronomers 'image' a mysterious dark object in the distant Universe
https://www.mpg.de/25518363/1007-asph-astronomers-image-a-mysterious-dark-object-in-the-distant-universe-155031-x
#ycombinator #gravitational_lensing #black_hole #distant_universe -
Astronomers 'image' a mysterious dark object in the distant Universe
https://www.mpg.de/25518363/1007-asph-astronomers-image-a-mysterious-dark-object-in-the-distant-universe-155031-x
#ycombinator #gravitational_lensing #black_hole #distant_universe -
Astronomers 'image' a mysterious dark object in the distant Universe
https://www.mpg.de/25518363/1007-asph-astronomers-image-a-mysterious-dark-object-in-the-distant-universe-155031-x
#ycombinator #gravitational_lensing #black_hole #distant_universe -
Astronomers 'image' a mysterious dark object in the distant Universe
https://www.mpg.de/25518363/1007-asph-astronomers-image-a-mysterious-dark-object-in-the-distant-universe-155031-x
#ycombinator #gravitational_lensing #black_hole #distant_universe -
#recurrence_plot analysis reveals periodic jet flaring and zig-zag evolution in PKS 1717+177, hinting at hidden #black_hole interactions and #neutrino emission. https://academic.oup.com/mnras/article/535/3/2742/7906601
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#recurrence_plot analysis reveals periodic jet flaring and zig-zag evolution in PKS 1717+177, hinting at hidden #black_hole interactions and #neutrino emission. https://academic.oup.com/mnras/article/535/3/2742/7906601
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#recurrence_plot analysis reveals periodic jet flaring and zig-zag evolution in PKS 1717+177, hinting at hidden #black_hole interactions and #neutrino emission. https://academic.oup.com/mnras/article/535/3/2742/7906601
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Webb – Space Telescope Live. What Is Webb Observing Now?
https://spacetelescopelive.org/webb?obsId=01HTJT20C0STKNZ01KQYGEKBQ1
#ycombinator #Astronomy #Astrophysics #Black_hole #Camera #Coronagraph #Cosmos #Countdown #Exoplanet #Galaxy #Hubble #Imaging #Infrared #Integral_Field_Unit #Microshutter #NASA #Nebula #Observation #Observing_schedule #Photometry #Planet #Proposal #Quasar #Research #Scientific_instrument #Scientific_process #Sky_map #Space #Spectrograph #Spectroscopy #Star #STScI #Telescope #Ultraviolet #Visible #Webb -
Webb – Space Telescope Live. What Is Webb Observing Now?
https://spacetelescopelive.org/webb?obsId=01HTJT20C0STKNZ01KQYGEKBQ1
#ycombinator #Astronomy #Astrophysics #Black_hole #Camera #Coronagraph #Cosmos #Countdown #Exoplanet #Galaxy #Hubble #Imaging #Infrared #Integral_Field_Unit #Microshutter #NASA #Nebula #Observation #Observing_schedule #Photometry #Planet #Proposal #Quasar #Research #Scientific_instrument #Scientific_process #Sky_map #Space #Spectrograph #Spectroscopy #Star #STScI #Telescope #Ultraviolet #Visible #Webb -
Webb – Space Telescope Live. What Is Webb Observing Now?
https://spacetelescopelive.org/webb?obsId=01HTJT20C0STKNZ01KQYGEKBQ1
#ycombinator #Astronomy #Astrophysics #Black_hole #Camera #Coronagraph #Cosmos #Countdown #Exoplanet #Galaxy #Hubble #Imaging #Infrared #Integral_Field_Unit #Microshutter #NASA #Nebula #Observation #Observing_schedule #Photometry #Planet #Proposal #Quasar #Research #Scientific_instrument #Scientific_process #Sky_map #Space #Spectrograph #Spectroscopy #Star #STScI #Telescope #Ultraviolet #Visible #Webb -
Webb – Space Telescope Live. What Is Webb Observing Now?
https://spacetelescopelive.org/webb?obsId=01HTJT20C0STKNZ01KQYGEKBQ1
#ycombinator #Astronomy #Astrophysics #Black_hole #Camera #Coronagraph #Cosmos #Countdown #Exoplanet #Galaxy #Hubble #Imaging #Infrared #Integral_Field_Unit #Microshutter #NASA #Nebula #Observation #Observing_schedule #Photometry #Planet #Proposal #Quasar #Research #Scientific_instrument #Scientific_process #Sky_map #Space #Spectrograph #Spectroscopy #Star #STScI #Telescope #Ultraviolet #Visible #Webb -
UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
https://chandra.si.edu/photo/2023/uhz1/
#ycombinator #about_chandra #chandra_information #chandra #cxc #hardware #science_instruments #subrahmanyan_chandrasekhar #telescope #observatory #X_ray #astronomy #astrophysics #axaf #black_hole #planetary #nebula #chandra_mission #chandra_contact_information #where_schandra #track_chandra #chandra_namesake -
UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
https://chandra.si.edu/photo/2023/uhz1/
#ycombinator #about_chandra #chandra_information #chandra #cxc #hardware #science_instruments #subrahmanyan_chandrasekhar #telescope #observatory #X_ray #astronomy #astrophysics #axaf #black_hole #planetary #nebula #chandra_mission #chandra_contact_information #where_schandra #track_chandra #chandra_namesake -
The #Event_Horizon_Telescope just revealed the first image EVER of the supermassive #black_hole in the centre of our own galaxy, Sagittarius A* (Sgr A*)!!!
God, I love science.https://eventhorizontelescope.org/blog/astronomers-reveal-first-image-black-hole-heart-our-galaxy
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The #Event_Horizon_Telescope just revealed the first image EVER of the supermassive #black_hole in the centre of our own galaxy, Sagittarius A* (Sgr A*)!!!
God, I love science.https://eventhorizontelescope.org/blog/astronomers-reveal-first-image-black-hole-heart-our-galaxy
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The #Event_Horizon_Telescope just revealed the first image EVER of the supermassive #black_hole in the centre of our own galaxy, Sagittarius A* (Sgr A*)!!!
God, I love science.https://eventhorizontelescope.org/blog/astronomers-reveal-first-image-black-hole-heart-our-galaxy
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Have you seen it? They captured an image of a black hole and its accretion disc residing in the heart of the M87 galaxy, 52 million light years away from us. This blows my mind on multiple levels. #ESO #astronomy #M87 #black_hole #science #ALMA #radioastronomy #mindblown
To understand what you are seeing, you might want to watch Derek's latest Veritasium video: https://youtu.be/zUyH3XhpLTo