Hacker News with Generative AI: Cosmology

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 6 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 14 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 23 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 26 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 27 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 33 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 39 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 55 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 55 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 56 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 56 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 61 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 71 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 74 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 95 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 99 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 103 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 106 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 115 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 125 days ago | 8 comments

Do we live in a shell universe? (phys.org)
The universe might not be as you think.

Cosmology, Physics, Universe

4 points by birriel 127 days ago | 0 comments

"dark stars" theory could solve universe's greatest mystery (sciencefocus.com)
A new theory suggests that dark matter, the mysterious substance that makes up 85% of the Universe's mass, could be made up of 'dark stars' - hypothetical stars that are powered by dark matter instead of hydrogen fusion.

Cosmology, Dark Matter, Physics, Astronomy, Science

14 points by jandrewrogers 132 days ago | 0 comments

The universe had a secret life before the Big Bang, new study hints (livescience.com)

Cosmology, Physics, Big Bang, Universe

16 points by jnord 139 days ago | 0 comments

Einstein's Other Theory of Everything (nautil.us)

Physics, Albert Einstein, Cosmology

178 points by dnetesn 139 days ago | 132 comments

Is the Hubble crisis connected with the extinction of dinosaurs? (2022) (arxiv.org)

Cosmology, Paleontology, Science

6 points by elashri 143 days ago | 0 comments

The possibilities for dark matter have shrunk (sciencenews.org)