The latest Cosmology Talk! Low mass dark matter halos are to gravitational waves, as the atmosphere is to stars. And because of that, LISA might detect them! (lower than 10^4 M_sol 😲) Featuring Miguel Zumalacárregui, Juan Urrutia and Han Gil Choi youtu.be/a5lIDTDRo4c

Probing Low Mass Dark Matter Halos with LISA | Choi, Urrutia & Zumalacárregui

YouTube video by Cosmology Talks

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Hope you enjoy watching this latest release from 'Cosmology Talks' where Shaun & I discuss: What cosmological inference of evolving (including Phantom) Dark Energy Does & Does Not Imply - in the context of DESI BAO results and beyond. Based on my recent work on the arXiv.

Shaun Hotchkiss@justshaun.bsky.social · 2mo ago

Latest DESI (+CMB +SN) data got you spooked? Seeing ghosts and *phantoms*? Don't panic! @primeval-arhsim.bsky.social is here to reassure you: "No phantoms are needed by current observational cosmology" youtu.be/etp-uezMgdw

Latest DESI (+CMB +SN) data got you spooked? Seeing ghosts and *phantoms*? Don't panic! @primeval-arhsim.bsky.social is here to reassure you: "No phantoms are needed by current observational cosmology" youtu.be/etp-uezMgdw

Phantom Dark Energy: What Cosmology Does and Does Not Imply (Swagat Mishra)

YouTube video by Cosmology Talks

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Fear not, cosmology masses. Cosmology from Home 2026 exists! In fact, it will run 21 Sept – 2 Oct and "early" registration just opened :-) cosmologyfromhome.com/registration/

Problems of uniform probabilities arise in contemporary cosmology. Head over to the conversation that Sylvia Wenmackers had with @justshaun.bsky.social about her recent paper on the issue! 💻👇 www.youtube.com/watch?v=MBeS... 📄 www.sciencedirect.com/science/arti... #philsci #philsky #physics #HPS

New Probability Axioms Could Fix Cosmology's Multiverse (Partially) - Sylvia Wenmackers

YouTube video by Cosmology Talks

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It's the moment that everyone on Bluesky is endlessly refreshing their timeline hoping for: The talk release of a "from Home" conference! Our knowledge of the universe is expanding at an accelerating rate... and Dark Energy from Home 2026 Talks just dropped.

Eric Linder - Dark Energy Phenomenology

YouTube video by Research Talks (from Home)

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Exciting! ........... Dark Energy from Home 2026 will be held from 21–24 April. Registration is now open: darkenergy.discussingresearch.com/registration Abstracts submitted by 24 March at 23:59 UTC will receive equal consideration. Later submissions will be reviewed at the organizers’ discretion.

It's the day everyone on Bluesky looks forward to: The talk release day of a from Home conference! Early Universe from Home 2026 Talks just dropped. Check them out, there's lots of really interesting stuff going on.

Diederik Roest - Isocurvature modes during turns and their imprint on the CMB

YouTube video by Research Talks (from Home)

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Discussions at Early Universe from Home kick off in just under two weeks, with talks released to participants in one week. Check out the updated list of speakers here: earlyuniverse.discussingresearch.com and register here: earlyuniverse.discussingresearch.com/registration/

"The evidence for dynamical dark energy relies too much on DESI's BAO, which is just one data set... " *Evidence for dynamical dark energy now seen with Dark Energy Survey BAO too* youtu.be/ukMQgHj6NMI

Dark Energy Survey - Combined cosmology from BAO + SN (+CMB) | Avila, Fernandez, Muir & Vincenzi)

YouTube video by Cosmology Talks

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Can gravitational waves get gravitationally lensed? Yes! Have we observed any such events? Maybe!?😮😃 youtu.be/ZGqOpDTL8k4

A magnified and diffracted black hole merger (GW231123) | Miguel Zumalacarregui

YouTube video by Cosmology Talks

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Want to know how to get at the non-linear cosmological scales to test modified gravity, using future large scale structure observations? Cosmology Talks has your back: youtu.be/nIdCpcObSVU

Cosmological Gravity on All Scales | Sankarshana Srinivasan

YouTube video by Cosmology Talks

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Fantastic time discussing whether the latest blockbuster cosmology results really do show that Dark Energy is evolving! Brilliant explanations from @clairelamman.bsky.social , @tamarastro.bsky.social and @justshaun.bsky.social Check it out! Full talk: youtu.be/reNicLW2vpY?... 🧪⚛️

Is Dark Matter Evolving? Cosmologists Explain

YouTube video by Bad Boy of Science

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Unfortunately it was pretty cloud during #Sunset this year at the South Pole, but our winterover Sim managed to catch this picture just before the weather got bad, with the moon over SPT! #southpole #Antarctica

🥳 It's paper day for the completed #ESO Kilo-Degree Survey. We end our journey with a consistent picture of #cosmology 😲 I've been co-leading KiDS for 12yrs & I'm so proud of what the team's achieved. If you're at the #Euclid meet, go to Angus Wright's talk @10am today!🔭 ℹ️: arxiv.org/pdf/2503.19441

What if I told you there is no S8 tension? youtu.be/PIQKe-tW1xQ

KiDS­ Legacy - The Final Cosmology Results

YouTube video by Cosmology Talks

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Rather appropriately, given this proliferation of "from Home" events, the next one to announce is: Multiverse from Home! I suspect discussion won't be hard to come by in this one 😅. multiverse.cosmodiscussion.com

Another "from Home" conference has launched (complete with the *perfect* banner image)... *Tabletop Scale Cosmology* Register now to discuss, and hear about, how you don't need giant telescopes and colliders to learn about the cosmos! tabletop.cosmodiscussion.com

A nice blog post by Gillian Beltz-Mohrmann about the DESI "unblinding" event last year, the excitement and the reactions: www.desi.lbl.gov/2025/03/19/a...

DESI's DR2 BAO results are out!! TL;DR... 1/n @desisurvey.bsky.social

🔊 New BAO analysis from the 3-year observations (DR2). Long story short, as follows. 1. DESI alone is consistent with LCDM. 👉 Boring 2. DESI and Planck have a 2.3 discrepancy in Ωm-H0rd plane. 👉Interesting.

I find this four parameter binned w(z) plot from DESI tantalising... the preference for w0,wa isn't coming from one isolated redshift.

Shaun Hotchkiss@justshaun.bsky.social · last yr.

This is starting to look believable (to me at least 😅) *Something* is certainly going on... Great work @desisurvey.bsky.social! youtu.be/YiRaDtslycE

No more new Cosmology Talks *today*, I promise!

JUST RELEASED: DESI DR1 & BAO RESULTS FROM DR2🌌

This is starting to look believable (to me at least 😅) *Something* is certainly going on... Great work @desisurvey.bsky.social! youtu.be/YiRaDtslycE

DESI 2025 - Cosmology Results from DR2 BAO (Garcia-Quintero & Martini)

YouTube video by Cosmology Talks

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Can't get enough of @ec-euclid.bsky.social? Here are three "key science areas" the consortium identified from the results today and wanted to talk more about: - Active Galactic Nuclei - Galaxy Morphology - Strong Lensing youtu.be/YGqaxDH00Yw

Euclid 2025: AGN, Galaxy Morphology & Strong Lensing (Matamoro, Walmsley & Holloway)

YouTube video by Cosmology Talks

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For an explainer on #Euclid's background and what's in the Q1 data release, here's a conversation between Shaun Hotchkiss (@justshaun.bsky.social), Guada Canas-Herrera (gcanasherrera.com) from @esa.int, and our Herve Aussel (@herveaussel.bsky.social). www.youtube.com/watch?v=DVlK... #space 🔭

Euclid 2025: Science Goals and Q1 Data Summary (Cañas-Herrera & Aussel)

YouTube video by Cosmology Talks

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With today’s #Q1Release, we get a preview of #ESAEuclid’s three Deep Fields: North, South and Fornax. 🤩 The location of the Deep Fields can be seen as the yellow patches on this all-sky view of ESA Gaia’s star map from its second data release in 2018, and ESA Planck’s dust map from 2014. (1/3)

27 @eucliduk.bsky.social papers too many to digest? Cosmology Talks has your back... (more to come later today too!) youtu.be/DVlKqFrvhRY

Euclid 2025: Science Goals and Q1 Data Summary (Cañas-Herrera & Aussel)

YouTube video by Cosmology Talks

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🚨 BIG NEWS ALERT! 🚨 We’re just 24 HOURS AWAY from a MAJOR DESI release! 🌉🔭 Tomorrow at 3 PM PT, DESI is unveiling DR1, our first official Data Release—the largest dataset of its kind, packed with information on 18.7 million galaxies, quasars, and stars! But that’s not all…