@gregoriobaq.bsky.social
Reposted
Anyway, speaking of physicists who actually are trying to make the case to the general public for why physics is worth funding, my latest @newscientist.com column is a love note to General Relativity and the Quantum Gravity Problem 😍
Ask your library if you're not a subscriber! 🧪🔭⚛️
Ask your library if you're not a subscriber! 🧪🔭⚛️
Why I still love reckoning with the quantum gravity problem
General relativity is an astonishingly beautiful theory, and grappling with why it disagrees with quantum mechanics is a joy, says Chanda Prescod-Weinstein
www.newscientist.com
April 16, 2025 at 7:33 PM
Anyway, speaking of physicists who actually are trying to make the case to the general public for why physics is worth funding, my latest @newscientist.com column is a love note to General Relativity and the Quantum Gravity Problem 😍
Ask your library if you're not a subscriber! 🧪🔭⚛️
Ask your library if you're not a subscriber! 🧪🔭⚛️
I am confident supermassive black holes formed before recombination; you could check on my tweet history that it is my prediction. Check @drbecky.bsky.social video 24:17 JWST spots the most distant glow of hydrogen ever found | Night Sky News... youtu.be/b7Q06j94j9U?si… via @YouTube
JWST spots the most distant glow of hydrogen ever found | Night Sky News April 2025
YouTube video by Dr. Becky
https://youtu.be/b7Q06j94j9U?si…
April 18, 2025 at 10:41 AM
I am confident supermassive black holes formed before recombination; you could check on my tweet history that it is my prediction. Check @drbecky.bsky.social video 24:17 JWST spots the most distant glow of hydrogen ever found | Night Sky News... youtu.be/b7Q06j94j9U?si… via @YouTube
Reposted
Really cool test of modified recombination from ACT’s recent release. Of course, it’s all consistent with the standard scenario — but that’s an amazing validation of our understanding of these atomic processes happening only 300k years after the big bang!
March 18, 2025 at 8:17 PM
Really cool test of modified recombination from ACT’s recent release. Of course, it’s all consistent with the standard scenario — but that’s an amazing validation of our understanding of these atomic processes happening only 300k years after the big bang!
Reposted
The Euclid mission just had its first major data release. More details — and more importantly, stunning images — in this press release: 🧪 #cosmology
Euclid opens data treasure trove, offers glimpse of deep fields
On 19 March 2025, the European Space Agency’s Euclid mission released its first batch of survey data, including a preview of its deep fields. Here, hundreds of thousands of galaxies in different shape...
www.esa.int
March 19, 2025 at 11:06 AM
The Euclid mission just had its first major data release. More details — and more importantly, stunning images — in this press release: 🧪 #cosmology
Reposted
Are you ready for it…?
Make room in your calendar for 19th March at 11:00, when stunning results with contributions from UK scientists will be revealed. 🚨 🗓️
#Euclid #Q1Release #Astronomy #Cosmology
Make room in your calendar for 19th March at 11:00, when stunning results with contributions from UK scientists will be revealed. 🚨 🗓️
#Euclid #Q1Release #Astronomy #Cosmology
March 12, 2025 at 3:51 PM
Are you ready for it…?
Make room in your calendar for 19th March at 11:00, when stunning results with contributions from UK scientists will be revealed. 🚨 🗓️
#Euclid #Q1Release #Astronomy #Cosmology
Make room in your calendar for 19th March at 11:00, when stunning results with contributions from UK scientists will be revealed. 🚨 🗓️
#Euclid #Q1Release #Astronomy #Cosmology
Reposted
Reposted
What are the biggest JWST discoveries so far?
#AskEthan
The biggest JWST discoveries aren't the farthest, most record-breaking things it saw.
It's these four surprising finds: the ones we only learned because we dared to look.
bigthink.com/starts-with-...
#space #astro #astronomy
#AskEthan
The biggest JWST discoveries aren't the farthest, most record-breaking things it saw.
It's these four surprising finds: the ones we only learned because we dared to look.
bigthink.com/starts-with-...
#space #astro #astronomy
Ask Ethan: What are the biggest JWST discoveries so far?
Since mid-2022, JWST has been showing us how the Universe grows up, from planets to galaxies and more. So, what's its biggest find of all?
bigthink.com
January 17, 2025 at 3:08 PM
What are the biggest JWST discoveries so far?
#AskEthan
The biggest JWST discoveries aren't the farthest, most record-breaking things it saw.
It's these four surprising finds: the ones we only learned because we dared to look.
bigthink.com/starts-with-...
#space #astro #astronomy
#AskEthan
The biggest JWST discoveries aren't the farthest, most record-breaking things it saw.
It's these four surprising finds: the ones we only learned because we dared to look.
bigthink.com/starts-with-...
#space #astro #astronomy
Reposted
Edwin Hubble submitted his paper "A relation between distance and radial velocity among extra-galactic nebulae" #OTD in 1929.
It showed that "extra-galactic nebulae" were moving away from us with a velocity that increased linearly with distance. 🧪 🔭 ⚛️
Image: Carnegie Observatories
It showed that "extra-galactic nebulae" were moving away from us with a velocity that increased linearly with distance. 🧪 🔭 ⚛️
Image: Carnegie Observatories
January 17, 2025 at 4:27 PM
Edwin Hubble submitted his paper "A relation between distance and radial velocity among extra-galactic nebulae" #OTD in 1929.
It showed that "extra-galactic nebulae" were moving away from us with a velocity that increased linearly with distance. 🧪 🔭 ⚛️
Image: Carnegie Observatories
It showed that "extra-galactic nebulae" were moving away from us with a velocity that increased linearly with distance. 🧪 🔭 ⚛️
Image: Carnegie Observatories
Reposted
Priyamvada Natarajan is the winner of the 2025 Dannie Heineman Prize for #Astrophysics. Natarajan was selected for her groundbreaking contributions to advancing our understanding of dark matter substructure in galaxy clusters, the formation and fueling of black holes.
ww2.aip.org/aip/awards/p...
ww2.aip.org/aip/awards/p...
Priyamvada Natarajan Wins 2025 Dannie Heineman Prize for Astrophysics - AIP.ORG
Yale University professor honored for groundbreaking research on dark matter and black hole physics.
ww2.aip.org
January 16, 2025 at 1:27 PM
Priyamvada Natarajan is the winner of the 2025 Dannie Heineman Prize for #Astrophysics. Natarajan was selected for her groundbreaking contributions to advancing our understanding of dark matter substructure in galaxy clusters, the formation and fueling of black holes.
ww2.aip.org/aip/awards/p...
ww2.aip.org/aip/awards/p...
Reposted
In addition to her published papers, there are at least 9 publicly available research talks by Priyamvada Natarajan on her work. Congrats to her on this award.
jrdmb.netlify.app/crt.html?s1=...
jrdmb.netlify.app/crt.html?s1=...
January 16, 2025 at 5:41 PM
In addition to her published papers, there are at least 9 publicly available research talks by Priyamvada Natarajan on her work. Congrats to her on this award.
jrdmb.netlify.app/crt.html?s1=...
jrdmb.netlify.app/crt.html?s1=...
Reposted
Congratulations to Priya!
Priyamvada Natarajan is the winner of the 2025 Dannie Heineman Prize for #Astrophysics. Natarajan was selected for her groundbreaking contributions to advancing our understanding of dark matter substructure in galaxy clusters, the formation and fueling of black holes.
ww2.aip.org/aip/awards/p...
ww2.aip.org/aip/awards/p...
Priyamvada Natarajan Wins 2025 Dannie Heineman Prize for Astrophysics - AIP.ORG
Yale University professor honored for groundbreaking research on dark matter and black hole physics.
ww2.aip.org
January 16, 2025 at 1:34 PM
Congratulations to Priya!
Reposted
A new claim that dark energy isn’t necessary, we just need to properly account for inhomogeneities in the universe. Maybe. But his idea has been discussed for a long time - David Wiltshire, an author here, has been pushing it for 20 years, and others have also looked at it. (1/n)
Astrophysics! What are your hot takes on this? I’m stuck at the airport and want to fight about space.
www.sci.news/astronomy/da...
www.sci.news/astronomy/da...
Dark Energy is Misidentification of Variations in Kinetic Energy of Universe’s Expansion, Scientists Say | Sci.News
Dark energy -- an unknown energy source that is causing our Universe’s expansion to accelerate – doesn’t actually exist, according to new research.
www.sci.news
December 27, 2024 at 2:40 PM
A new claim that dark energy isn’t necessary, we just need to properly account for inhomogeneities in the universe. Maybe. But his idea has been discussed for a long time - David Wiltshire, an author here, has been pushing it for 20 years, and others have also looked at it. (1/n)
Reposted
My new paper giving reasons why the cosmological constant and Newton's constant should not be treated as running parameters in physical processes.
arxiv.org/abs/2412.08773
arxiv.org/abs/2412.08773
Do $Λ_{CC}$ and $G$ run?
No. In this brief pedagogic note, I describe why the cosmological constant and Newton's constant are not running parameters in physical reactions.
arxiv.org
December 13, 2024 at 3:25 PM
My new paper giving reasons why the cosmological constant and Newton's constant should not be treated as running parameters in physical processes.
arxiv.org/abs/2412.08773
arxiv.org/abs/2412.08773
Reposted
That’s not socialism. That’s Naziism, aka violent, racist fascism.
After years of talking to Trump supporters my view of them has become very simple: They want socialist, even sometimes progressive reforms but they want them from someone who makes those reforms feel powerful and masculine and they want to make sure the people they don't like don't benefit from them
we're cooked
December 10, 2024 at 7:29 PM
That’s not socialism. That’s Naziism, aka violent, racist fascism.
Reposted
Happy birthday to Margaret Geller!
In my opinion, contributions that Geller and collaborators made to our understanding of the large-scale, 3D structure of the Universe are comparable in importance to Hubble expansion and cosmic acceleration. (11/11)
Image: Geller / SAO
In my opinion, contributions that Geller and collaborators made to our understanding of the large-scale, 3D structure of the Universe are comparable in importance to Hubble expansion and cosmic acceleration. (11/11)
Image: Geller / SAO
December 8, 2024 at 4:32 PM
Happy birthday to Margaret Geller!
In my opinion, contributions that Geller and collaborators made to our understanding of the large-scale, 3D structure of the Universe are comparable in importance to Hubble expansion and cosmic acceleration. (11/11)
Image: Geller / SAO
In my opinion, contributions that Geller and collaborators made to our understanding of the large-scale, 3D structure of the Universe are comparable in importance to Hubble expansion and cosmic acceleration. (11/11)
Image: Geller / SAO
Reposted
James Webb telescope confirms we have no idea why the universe is growing the way it is
https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-huge-crisis-in-our-understanding-of-cosmic-expansion
https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-huge-crisis-in-our-understanding-of-cosmic-expansion
December 11, 2024 at 2:06 PM
James Webb telescope confirms we have no idea why the universe is growing the way it is
https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-huge-crisis-in-our-understanding-of-cosmic-expansion
https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-huge-crisis-in-our-understanding-of-cosmic-expansion
'Our understanding of the universe may be incomplete': James Webb Space Telescope data suggests we need a 'new cosmic feature' to explain it all yahoo.com/news/underst... via
@Yahoo
@Yahoo
'Our understanding of the universe may be incomplete': James Webb Space Telescope data suggests we need a 'new cosmic feature' to explain it all
'Hubble was right!' The largest cosmic survey from the James Webb Space Telescope indicates scientists may need another ingredient in their cosmic recipe.
yahoo.com
December 11, 2024 at 2:51 PM
'Our understanding of the universe may be incomplete': James Webb Space Telescope data suggests we need a 'new cosmic feature' to explain it all yahoo.com/news/underst... via
@Yahoo
@Yahoo
Reposted
This one is a design for an axion dark matter detection experiment. Notably, this is focused on the scenario where axions were produced *after* inflation, meaning that the misalignment angle may vary and there could be topological defects. #cosmology
arxiv.org/abs/2411.18914
arxiv.org/abs/2411.18914
Toward a practical haloscope for the post-inflation axion incorporating a photonic band gap structure
Current and future searches for dark matter axions, based on their resonant conversion to photons in a magnetic field, span many orders of magnitude, from the very low mass GUT-scale axion to the very...
arxiv.org
December 2, 2024 at 3:51 PM
This one is a design for an axion dark matter detection experiment. Notably, this is focused on the scenario where axions were produced *after* inflation, meaning that the misalignment angle may vary and there could be topological defects. #cosmology
arxiv.org/abs/2411.18914
arxiv.org/abs/2411.18914
Reposted
This one probes the extent to which the halo mass function is universal and robust across variation of several cosmological parameters. They find close consistency which I think is a problem for using HMF for distinguishing between cosmological models! #cosmology arxiv.org/abs/2411.18722
On the universality of the halo mass function beyond $Λ$CDM cosmology
The abundance of dark matter haloes as a function of halo mass is a key diagnostic for constraining the cosmological model. The theoretical framework based on excursion set arguments, when applied to ...
arxiv.org
December 2, 2024 at 3:49 PM
This one probes the extent to which the halo mass function is universal and robust across variation of several cosmological parameters. They find close consistency which I think is a problem for using HMF for distinguishing between cosmological models! #cosmology arxiv.org/abs/2411.18722
Reposted
Today's #arXiv papers of interest 🧪 🔭 ⚛️
This one has a mass-generation mechanism for asymmetric dark matter! (and seems to require dark pions, which they refer to as ALPs) #cosmology
arxiv.org/abs/2411.18725
This one has a mass-generation mechanism for asymmetric dark matter! (and seems to require dark pions, which they refer to as ALPs) #cosmology
arxiv.org/abs/2411.18725
Generating the Dark Matter mass from the QCD vacuum: A new approach to the Dark Matter-Baryon coincidence problem
The comparable abundances of dark matter and baryons imply a deep connection between the dark sector and the QCD sector. In models of asymmetric dark matter, the number densities of both sectors are e...
arxiv.org
December 2, 2024 at 3:43 PM
Today's #arXiv papers of interest 🧪 🔭 ⚛️
This one has a mass-generation mechanism for asymmetric dark matter! (and seems to require dark pions, which they refer to as ALPs) #cosmology
arxiv.org/abs/2411.18725
This one has a mass-generation mechanism for asymmetric dark matter! (and seems to require dark pions, which they refer to as ALPs) #cosmology
arxiv.org/abs/2411.18725
Reposted
Saw that your U of Helsinki talk on Nov 20, Dark Energy and cosmology from the first data release of DESI, was posted today at their website
www.helsinki.fi/en/unitube/v...
www.helsinki.fi/en/unitube/v...
Cosmology seminar 20.11.2024 Seshadri Nadathur | University of Helsinki
www.helsinki.fi
November 27, 2024 at 4:07 PM
Saw that your U of Helsinki talk on Nov 20, Dark Energy and cosmology from the first data release of DESI, was posted today at their website
www.helsinki.fi/en/unitube/v...
www.helsinki.fi/en/unitube/v...
Reposted
Last but not least, we improve by 15% the upper bound on the sum of the neutrino masses (within ΛCDM) setting the upper bound to be 0.071 eV at 95% c.l.
November 21, 2024 at 1:03 PM
Last but not least, we improve by 15% the upper bound on the sum of the neutrino masses (within ΛCDM) setting the upper bound to be 0.071 eV at 95% c.l.
Reposted
The Crisis in Cosmology Just Got So Much Worse
YouTube video by Sabine Hossenfelder
www.youtube.com
December 1, 2024 at 4:20 PM
Reposted
Hey, it's that time of year. Need a telescope gift-giving buying guide? I (and some friends) got you covered!
badastronomy.beehiiv.com/p/ban-275-te...
badastronomy.beehiiv.com/p/ban-275-te...
BAN #275: Telescope buying advice, Book: It’s Alive, Dial-A-Moon 2021
30 November 2020 Issue #271
badastronomy.beehiiv.com
November 30, 2024 at 2:14 PM
Hey, it's that time of year. Need a telescope gift-giving buying guide? I (and some friends) got you covered!
badastronomy.beehiiv.com/p/ban-275-te...
badastronomy.beehiiv.com/p/ban-275-te...
Reposted
Is the universe really infinite? Or could it close back on itself like a sphere? If it’s infinite, how can it expand? Take this quiz to check how much you remember. You can now also create your own quizzes (with GPT!) on my website.
quizwithit.com/start_thequi...
quizwithit.com/start_thequi...
Is the Universe Infinite or Finite?
Is the universe really infinite? Or could it close back on itself like a sphere? If it’s infinite, how can it expand? And is it true that there might be copies of you in it? Take this quiz to check ho...
quizwithit.com
November 30, 2024 at 4:03 PM
Is the universe really infinite? Or could it close back on itself like a sphere? If it’s infinite, how can it expand? Take this quiz to check how much you remember. You can now also create your own quizzes (with GPT!) on my website.
quizwithit.com/start_thequi...
quizwithit.com/start_thequi...