Hacker News with Generative AI: Cosmology

'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 14 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 14 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 14 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 14 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 19 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 36 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 43 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 49 days ago | 2 comments

Terence Tao on how we measure the cosmos [video] (youtube.com)

Mathematics, Cosmology, Video, Terence Tao

6 points by andrepd 53 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 61 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 81 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 89 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 98 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 100 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 101 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 108 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 114 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 129 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 130 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 131 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 131 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 135 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 146 days ago | 9 comments

Black hole feeds at 40 times the 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, Astrophysics, Cosmology, Science

5 points by rbanffy 149 days ago | 0 comments

Study: Dark matter doesn't exist, the universe is 27B years old (earth.com)

Cosmology, Physics, Universe, Astronomy

54 points by msolujic 170 days ago | 78 comments

The 'Beautiful Confusion' of the First Billion Years Comes into View (quantamagazine.org)
Astronomers are reveling in the James Webb Space Telescope’s discoveries about the formative epoch of cosmic history.

Astronomy, Space Exploration, Cosmology, Early Universe

24 points by bookofjoe 174 days ago | 0 comments

New research suggests that our universe has no dark matter (phys.org)
A study, published today in The Astrophysical Journal, challenges the current model of the universe by showing that, in fact, it has no room for dark matter.

Physics, Astronomy, Cosmology, Dark Matter

92 points by squircle 178 days ago | 36 comments

Webb Researchers Discover Lensed Supernova, Confirm Hubble Tension (nasa.gov)
Measuring the Hubble constant, the rate at which the universe is expanding, is an active area of research among astronomers around the world who analyze data from both ground- and space-based observatories.

Space, Astronomy, Science, Cosmology

5 points by r721 180 days ago | 0 comments

Operator algebras and the substructure of space and time (quantamagazine.org)
Motivated by the mysteries of black holes, theorists are advancing their ability to describe space-time as a hologram.

Physics, Cosmology, Quantum Mechanics, Holograms

88 points by pseudolus 189 days ago | 29 comments

We're all living in a black hole: The bold theory scientists can't disprove (sciencefocus.com)

Black Holes, Physics, Science, Cosmology

7 points by tu7001 200 days ago | 8 comments