Hacker News with Generative AI: Black Holes

Singularities in Space-Time Prove Hard to Kill (quantamagazine.org)
Black hole and Big Bang singularities break our best theory of gravity. A trilogy of theorems hints that physicists must go to the ends of space and time to find a fix.
Physics, Black Holes, Cosmology, General Relativity
38 points by nsoonhui 31 days ago | 59 comments
Dead Stars Don’t Radiate (wordpress.com)
Three guys claim that any heavy chunk of matter emits Hawking radiation, even if it’s not a black hole:
Physics, Black Holes, Astronomy, Radiation
246 points by thechao 41 days ago | 148 comments
Astronomers confirm the existence of a lone black hole (phys.org)
A team of astronomers at the Space Telescope Science Institute, working with one colleague from the University of St Andrews' Center for Exoplanet Science and another from the European Southern Observatory, has confirmed the existence of a lone black hole.
Astronomy, Black Holes, Space
241 points by wglb 67 days ago | 172 comments
A star appears to have collapsed straight into a black hole without supernova (2017) (nasa.gov)
Astronomers have watched as a massive, dying star was likely reborn as a black hole. It took the combined power of the Large Binocular Telescope (LBT), and NASA's Hubble and Spitzer space telescopes to go looking for remnants of the vanquished star, only to find that it disappeared out of sight.
Astronomy, Black Holes, Supernova
77 points by bfeist 70 days ago | 35 comments
The Entire Universe Could Exist Inside a Black Hole – Here's Why (sciencealert.com)
When you peer out into the depths of the cosmos, a mystery lies there, waiting.
Black Holes, Cosmology, Physics, Space
8 points by chriskanan 74 days ago | 3 comments
String Theorists Say Black Holes Are Multidimensional String 'Supermazes' (scientificamerican.com)
Black holes, the densest objects in the universe, eat up anything that comes too close, even light. Is there anything left inside these behemoths that could reveal what they devoured in the first place? String theory, an attempt to merge gravity with quantum physics, says yes. A new study suggests that within black holes lie tangled pathways of strings called supermazes, which hold that information in multiple dimensions.
String Theory, Physics, Black Holes, Cosmology
16 points by simplesort 81 days ago | 27 comments
Is our universe trapped inside a black hole? This JWS Telescope discovery (space.com)
Black Holes, Space Exploration, Cosmology, Astronomy, Physics
81 points by janandonly 104 days ago | 56 comments
Supermassive Black Hole Likely Lurking in Milky Way's Nearest Neighbor (caltech.edu)
Astronomers have found what appears to be the closest supermassive black hole outside of our own Milky Way galaxy.
Astronomy, Black Holes, Milky Way
4 points by gmays 110 days ago | 0 comments
New maps of the chaotic space-time inside black holes (quantamagazine.org)
At the beginning of time and the center of every black hole lies a point of infinite density called a singularity.
Black Holes, Physics, Space-Time, Cosmology
132 points by rbanffy 122 days ago | 103 comments
Gravitational Effects of Small Primordial Black Hole Passing Through Human Body (arxiv.org)
The gravitational effects of a primordial black hole (PBH) passing through the human body are examined, with the goal of determining the minimum mass necessary to produce significant injury or death.
Physics, Black Holes, Space, Human Body, Medical
101 points by bookofjoe 128 days ago | 102 comments
M87* One Year Later: Catching the Black Hole's Turbulent Accretion Flow (eventhorizontelescope.org)
Six years after the historic release of the first-ever image of a black hole, the Event Horizon Telescope (EHT) Collaboration unveils a new analysis of the supermassive black hole at the heart of the galaxy M87, known as M87*. This analysis combines observations made in 2017 and 2018, and reveals new insights into the structure and dynamics of plasma near the event horizon.
Black Holes, Astronomy, Science, Space
37 points by jmainh 156 days ago | 3 comments
Gaia Detected an Entire Swarm of Black Holes Moving Through the Milky Way (sciencealert.com)
A fluffy cluster of stars spilling across the sky may have a secret hidden in its heart: a swarm of over 100 stellar-mass black holes.
Black Holes, Astronomy, Milky Way, Space
9 points by rbanffy 160 days ago | 0 comments
X-ray flashes from nearby supermassive black hole accelerate mysteriously (news.mit.edu)
One supermassive black hole has kept astronomers glued to their scopes for the last several years. First came a surprise disappearance, and now, a precarious spinning act.
Black Holes, Astronomy, Astrophysics, Science, Space
81 points by rbanffy 164 days ago | 4 comments
Enough water to fill trillions of Earth's oceans found circling a black hole (earth.com)
Astronomers have identified a remarkable water reservoir hidden in a corner of the cosmos, circling a quasar more than 12 billion light-years away.
Space, Astronomy, Black Holes, Water
16 points by spopejoy 186 days ago | 4 comments
Images of gamma-ray flare from supermassive black hole M87 (newsroom.ucla.edu)
The first-ever photo of a black hole rocked the world in 2019, when the Event Horizon Telescope, or EHT, published an image of the supermassive black hole at the center of the galaxy M87, also known as Virgo A or NGC 4486, located in the constellation of Virgo.
Black Holes, Astronomy, Science
58 points by gmays 193 days ago | 18 comments
Tiny Black Holes Could Have Left Tunnels Inside Earth's Rocks (gizmodo.com)
A pair of imaginative cosmologists have great news for everyone: If a primordial black hole tunnels through your body, you probably won’t die.
Black Holes, Physics, Earth Science, Cosmology
24 points by rbanffy 193 days ago | 11 comments
Searching for small primordial black holes in planets, asteroids, here on Earth (sciencedirect.com)
Small primordial black holes could be captured by rocky planets or asteroids, consume their liquid cores from inside and leave hollow structures.
Black Holes, Astronomy, Earth Science, Planets, Asteroids
10 points by rntn 194 days ago | 5 comments
Researchers spot black hole feeding at 40x its theoretical limit (arstechnica.com)
How did supermassive black holes end up at the center of every galaxy? A while back, it wasn't that hard to explain: That's where the highest concentration of matter is, and the black holes had billions of years to feed on it. But as we've looked ever deeper into the Universe's history, we keep finding supermassive black holes, which shortens the timeline for their formation.
Black Holes, Astronomy, Cosmology, Physics
42 points by nithinj 216 days ago | 52 comments
Black Hole Cosmology (wikipedia.org)
A black hole cosmology (also called Schwarzschild cosmology or black hole cosmological model) is a cosmological model in which the observable universe is the interior of a black hole.
Cosmology, Black Holes, Physics, Theoretical Physics
5 points by typeofhuman 217 days ago | 0 comments
Show HN: Physically accurate black hole simulation using your iPhone camera (apple.com)
What would the world around you look like if you were staring at a black hole? This application places a black hole in the field of view of your iPhone’s camera and gravitationally "lenses" the resulting live video feeds just as a black hole would warp the light from surrounding stars.
Black Holes, Augmented Reality, Physics, Mobile Apps
316 points by yunyu 220 days ago | 115 comments
First image of our Milky Way's black hole may be inaccurate, scientists say (space.com)
Astronomy, Black Holes, Milky Way, Science
26 points by Stubb 231 days ago | 11 comments
Famous picture of black hole in our galaxy might not be accurate, research says (independent.co.uk)
The famous first picture of the supermassive black hole at the heart of our galaxy might not be accurate, a new study has claimed.
Astronomy, Black Holes, Science, Research
5 points by amichail 242 days ago | 0 comments
The Event Horizon Telescope image might need a correction (academic.oup.com)
We propose that the ring structure found by the Event Horizon Telescope Collaboration (EHTC) as the black hole shadow of Sgr A* is an artefact caused by the bumpy point spread function (PSF) of the EHT 2017 data.
Astronomy, Black Holes, Science, Research
59 points by niemandhier 243 days ago | 14 comments
First black hole discovered with two orbiting stars (cosmosmagazine.com)
For the first time, a black hole has been discovered with two orbiting stars, leading astrophysicists to suggest a surprising way such systems could form.
Astronomy, Black Holes, Binary Stars
5 points by geox 246 days ago | 0 comments
How do merging supermassive black holes pass the final parsec? (quantamagazine.org)
Galaxies have been merging into ever-bigger structures over the course of cosmic history. When galaxies merge, the supermassive black holes that sit in their centers must eventually merge, too, forming an even more gargantuan black hole.
Astrophysics, Black Holes, Galaxy Mergers
78 points by jnord 247 days ago | 107 comments
Black Hole Destroys Star, Goes After Another, NASA Missions Find (chandra.si.edu)
A giant black hole has destroyed one star and now is using that stellar debris to pummel another star or smaller black hole.
Space, Astronomy, Black Holes, Stars
18 points by raattgift 261 days ago | 3 comments
Stupendously Large: How big can black holes get? (bbc.com)
Astronomers are spotting a new class of giant black holes that dwarf even the supermassive ones found at the centre of galaxies. Could there be some even more monstrous lurking out there in the darkness of space?
Black Holes, Astronomy, Space
6 points by alexanderdmitri 263 days ago | 0 comments
Astronomers Spot a Black Hole with a Cosmic Wingspan (nytimes.com)
Astronomers announced last week that they had discovered a black hole spitting energy across 23 million light-years of intergalactic space.
Space, Astronomy, Black Holes
7 points by axiomdata316 275 days ago | 1 comments
A wobble from Mars could be sign of dark matter (phys.org)
In a new study, MIT physicists propose that if most of the dark matter in the universe is made up of microscopic primordial black holes—an idea first proposed in the 1970s—then these gravitational dwarfs should zoom through our solar system at least once per decade.
Dark Matter, Astronomy, Physics, Black Holes
30 points by wglb 277 days ago | 33 comments
Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy (phys.org)
Astronomers have spotted the biggest pair of black hole jets ever seen, spanning 23 million light-years in total length. That's equivalent to lining up 140 Milky Way galaxies back to back.
Black Holes, Astronomy, Space, Physics
127 points by wglb 281 days ago | 79 comments