Hacker News with Generative AI: Cosmology

Half of the universe's hydrogen gas, long unaccounted for, has been found (news.berkeley.edu)
Astronomers tallying up all the normal matter — stars, galaxies and gas — in the universe today have come up embarrassingly short of the total matter  produced in the Big Bang 13.6 billion years ago.
Astronomy, Universe, Cosmology, Hydrogen
8 points by gmays 1 day ago | 0 comments
Half of the universe's hydrogen gas, long unaccounted for, has been found (phys.org)
Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short of the total matter produced in the Big Bang 13.6 billion years ago.
Cosmology, Astronomy, Physics, Missing Matter
12 points by PaulHoule 2 days ago | 1 comments
Major Problem in Physics Could Be Fixed If the Whole Universe Was Spinning (sciencealert.com)
Earth rotates, the Sun rotates, the Milky Way rotates – and a new model suggests the entire Universe could be rotating. If confirmed, it could ease a significant tension in cosmology.
Physics, Cosmology, Universe, Rotation
11 points by amichail 10 days ago | 5 comments
Researcher proposes model replacing dark energy/matter to explain universe (phys.org)
Dr. Richard Lieu, a physics professor at The University of Alabama in Huntsville (UAH), a part of The University of Alabama System, has published a paper in the journal Classical and Quantum Gravity that proposes a universe built on steps of multiple singularities rather than the Big Bang alone to account for the expansion of the cosmos.
Cosmology, Physics, Science, Theoretical Physics
64 points by wglb 12 days ago | 89 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 12 days ago | 3 comments
Why Everything in the Universe Turns More Complex (quantamagazine.org)
A new suggestion that complexity increases over time, not just in living organisms but in the nonliving world, promises to rewrite notions of time and evolution.
Physics, Cosmology, Entropy, Complexity, Evolution
149 points by konradx 12 days ago | 98 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 18 days ago | 27 comments
'More than a hint' that dark energy isn't what astronomers thought (nytimes.com)
An international team of astronomers on Wednesday unveiled the most compelling evidence to date that dark energy — a mysterious phenomenon pushing our universe to expand ever faster — is not a constant force of nature but one that ebbs and flows through cosmic time.
Cosmology, Astronomy, Dark Energy, Science
140 points by Hooke 37 days ago | 99 comments
Dark Energy experiment challenges Einstein's theory of Universe (bbc.com)
The mysterious force called Dark Energy, which drives the expansion of the Universe, might be changing in a way that challenges our current understanding of time and space, scientists have found.
Cosmology, Physics, Science, Einstein, Dark Energy
4 points by ViktorRay 37 days ago | 0 comments
Is Dark Energy Getting Weaker? New Evidence Strengthens the Case (quantamagazine.org)
Last spring, a team of nearly 1,000 cosmologists announced that dark energy — the enigmatic agent propelling the universe to swell in size at an ever-increasing rate — might be slackening.
Cosmology, Dark Energy, Physics, Science
32 points by pseudolus 37 days ago | 12 comments
New high-definition images released of the baby universe (princeton.edu)
New research by the Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe’s infancy — the earliest cosmic time yet accessible to humans.
Astronomy, Cosmology, Science, Universe
12 points by layer8 38 days ago | 0 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 42 days ago | 56 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 60 days ago | 103 comments
Terence Tao on how we measure the cosmos – Distance ladder [video] (youtube.com)
Cosmology, Mathematics, Astronomy, Video, Science
15 points by ProAm 66 days ago | 0 comments
Astronomers Amazed by Perfect 'Einstein Ring' Gleaming in Space (sciencealert.com)
Around a galaxy just 590 million light-years away, astronomers have discovered a stunning example of one of the rarest phenomena in our skies: a perfect ring of light.
Astronomy, Space, Cosmology, Gravitational Lensing
6 points by bookofjoe 72 days ago | 2 comments
Terence Tao on how we measure the cosmos [video] (youtube.com)
Mathematics, Cosmology, Video, Terence Tao
6 points by andrepd 76 days ago | 0 comments
Cosmologists Try a New Way to Measure the Shape of the Universe (quantamagazine.org)
Is the universe flat and infinite, or something more complex? We can’t say for sure, but a new search strategy is mapping out the subtle signals that could reveal if the universe has a shape.
Cosmology, Universe, Science, Physics
36 points by jandrewrogers 85 days ago | 2 comments
Physicists who want to ditch dark energy (nautil.us)
The idea that mysterious stuff speeds up the acceleration of the universe could be a big mistake
Physics, Cosmology, Dark Energy
106 points by dnetesn 104 days ago | 147 comments
Dark Energy May Not Exist: Something Stranger Might Explain the Universe (sciencealert.com)
There might not be a mysterious 'dark' force accelerating the expansion of the Universe after all. The truth could be much stranger – bubbles of space where time passes at drastically different rates.
Cosmology, Physics, Universe, Time
74 points by NelsonMinar 113 days ago | 76 comments
James Webb's Big Year for Cosmology – Universe Today (universetoday.com)
The James Webb Space Telescope was designed and built to study the early universe, and hopefully revolutionary our understanding of cosmology. Two years after its launch, it’s doing just that.
Space Exploration, Cosmology, Science, Astronomy
4 points by rbanffy 121 days ago | 0 comments
Supernovae Evidence for Foundational Change to Cosmological Models (arxiv.org)
We present a new, cosmologically model-independent, statistical analysis of the Pantheon+ type Ia supernovae spectroscopic dataset, improving a standard methodology adopted by Lane et al.
Astronomy, Supernovae, Cosmology, Scientific Research
107 points by jandrewrogers 124 days ago | 74 comments
The Sean Carrolls Explain the Universe (nautil.us)
Why are we here? Is there life on other planets? The renowned scientists who share a name share their answers to life’s big questions.
Science, Philosophy, Space, Cosmology, Life
24 points by dnetesn 125 days ago | 8 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 131 days ago | 11 comments
Boltzmann brain (wikipedia.org)
The Boltzmann brain thought experiment suggests that it might be more likely for a brain to spontaneously form in space, complete with a memory of having existed in our universe, rather than for the entire universe to come about in the manner cosmologists think it actually did.
Cosmology, Physics, Philosophy, Thought Experiments
148 points by josephwegner 137 days ago | 150 comments
We are unlikely to be in this universe, new study finds. Multiverse falsified? [video] (youtube.com)
Multiverse, Physics, Cosmology, Science, Video
3 points by amichail 153 days ago | 0 comments
The impact of the cosmological constant on past and future star formation (academic.oup.com)
We present an extended analytical model for cosmic star formation, with the aim of investigating the impact of cosmological parameters on the star formation history within the \$\Lambda\$CDM paradigm.
Cosmology, Astrophysics, Star Formation, Scientific Research, Lambda-CDM Model
24 points by bookofjoe 153 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 154 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 154 days ago | 0 comments
Coincidences that make our existence possible (bigthink.com)
There are a few small cosmic details that, if things were just a little different, wouldn’t have allowed our existence to be possible.
Cosmology, Existence, Science, Probability
33 points by Brajeshwar 159 days ago | 47 comments
Probing unknown unknowns: A new generation of telescopes (mappingignorance.org)
In recent decades, we’ve learnt huge amounts about the universe and its history. The rapidly developing technology of telescopes – both on Earth and in space – has been a key part of this process, and those that are due to start operating over the next two decades should push the boundaries of our understanding of cosmology much further.
Astronomy, Telescopes, Cosmology, Science
42 points by Gedxx 170 days ago | 9 comments