#darkenergy — Public Fediverse posts

A catalogue of 3,000 supernovae — the largest ever assembled — is challenging existing theories of dark energy

https://www.universetoday.com/articles/a-new-catalog-of-close-to-3000-supernova-challenges-theories-on-dark-energy

#science #astronomy #darkenergy

A catalogue of 3,000 supernovae — the largest ever assembled — is challenging existing theories of dark energy
https://www.universetoday.com/articles/a-new-catalog-of-close-to-3000-supernova-challenges-theories-on-dark-energy
The most comprehensive catalogue of Type Ia supernovae ever assembled has produced new clues about dark energy, the mysterious force driving the universe's accelerating expansion — and some of those c
#science #astronomy #darkenergy

Two of the Universe's Great Mysteries May Have Their Own Dimension

https://fed.brid.gy/r/https://www.wired.com/story/dark-energy-matter-may-have-own-dimension/

The Beginnings of Man -Part 1

https://tonyaholisticblog.com/2026/08/31/the-beginnings-of-man-part-1/

Can a #Lumpy #Universe explain #DarkEnergy? : Medium

The #Emerging Link Between #Microplastics and #HeartDisease : Time

#Supplement that #Binds to #Microplastics may remove them from our #Body : New Sci

Latest #KnowledgeLinks

https://knowledgezone.co.in/resources/bookmarks

A DESI Milestone

Yesterday the Open Journal of Astrophysics published a paper by Porredon et al which will feature in the usual Saturday round-up. That paper, which is based on the First Data Release from the Dark Energy Spectroscopic Instrument (DESI) reminded me that I should mention that DESI recently reached an amazing milestone – it has now mapped the positions and redshifts of 47 million galaxies and quasars! There is a full press-release about this achievement here.

Here’s a little video showing how the survey works:

https://www.youtube.com/watch?v=6H3diAK_KIc

There are more videos and other graphics in the press release.

Here’s a nice picture showing a thin slice through the full survey that reveals the characteristic “cosmic web” of the large-scale structure of the Universe in all its glory:

This progress is great, but it really makes me feel old. Forty years ago, in 1986, I had just started my PhD. The state-of-the-art galaxy redshift survey slice then is shown in this plot, from de Lapparent et al 1986 (ApJLett 302, L1), one of the first papers I read as a research student (I got it in 1985 as a preprint), which contains just 1,100 galaxies:

It is worth mentioning that although DESI has now covered its original target area, it will continue until 2028. You can never have too many galaxy redshifts!

NOIRLab image of the week

Gemini North Under a Blanket of Airglow

Release date: Feb. 26, 2025
Full credits and details: https://noirlab.edu/public/images/iotw2509a/

I took the liberty to upload its panorama version in this interactive 360° app, give it a spin, it's beautiful: https://www.360cities.net/image/gemini-north-under-a-blanket-of-airglow-360-panorama/vr

#Astronomy #NOIRLab #MaunaKea #stars #milkyway #photography #astrophotography #airglow #nightskyphotography #darkenergy #Hawaii #GeminiNorth #telescope #science #STEM #astrodon #360panorama #360pano

Cosmology Talks: Recent DESI Power Spectrum Results

Some weeks ago I posted an item about recent results that have emerged from the DESI (Dark Energy Spectroscopic Instrument) Collaboration. I have been a bit busy since then but I just saw that there is one of those Cosmology Talks about these results which I thought I would pass on. The contributors are Arnaud de Mattia, Hector Gil-Marín and Pauline Zarrouk and they are talking about the analsysis they have done using the “full shape” of the galaxy power spectrum. It’s quite a long video, but very illuminating.

https://www.youtube.com/watch?v=-2mlU-YzEbw

#Cosmology #CosmologyTalks #DarkEnergy #DarkEnergySpectroscopicInstrument #DESI #Physics

Great Nature News Feature article on the recent DESI Survey results on dark energy

With a final quote by Jim Peebles: “I find it very difficult to imagine that ΛCDM is the end of the story. It’s too simple.”

https://www.nature.com/articles/d41586-024-01273-4

#Cosmology #DarkEnergy #ΛCDM #JimPeebles #DESI #survey #DESIsurvey #BAO #BaryonAcousticOscillations #galaxies #astronomy #astrophysics #astrodon #Nature #news #science

Congratulations to DESI (Dark Energy Spectroscopic Instrument) for their first detection of the baryon acoustic oscillations (BAO) signal using early data.

https://arxiv.org/abs/2304.08427

#universe #cosmology #bao #desi #survey #desisurvey #darkenergy #astronomy #astrophysics #astrodon #space #science #research

Ya'll, I made a planetarium movie!!
It's about mapping the universe with DESI and includes a flight through the real positions of 14 million galaxies. For anyone without access to a planetarium, here's a flat version:
https://youtu.be/bYKUb05mnPk

#astronomy #scicomm #cosmology #astrofun #science #ScienceEd #ScienceEngagement #darkenergy #film

The DESI Peculiar Velocity Survey, the largest survey of galaxies peculiar velocities planned to date. Great stuff for the future of mapping the universe with cosmic flows!
https://arxiv.org/abs/2302.13760

More on DESI the Dark Energy Spectroscopic Instrument: https://www.desi.lbl.gov/

#universe #cosmology #cosmicflows #cosmography #desi #survey #desisurvey #darkenergy #astronomy #astrophysics #astrodon #space #science #research

#AlanGuth - What Happens in the Far Far #Future ?

https://www.youtube.com/watch?v=0dOiOgr57iU&ab_channel=CloserToTruth

#Science #Physics #Cosmology #Astrophysics #Astronomy #BigBang #Inflation #BigBangTheory #InflationTheory #EternalInflation #ChaoticInflation #FarFuture #PocketUniverse #PocketUniverses #Multiverse #DarkEnergy #CosmologicalConstant #CloserToTruth #RobertKuhn

An astrophysicist explains the often-misunderstood nature of dark energy - Produced and directed by Corey Eisenstein. Click here for transcript. (vide... - https://arstechnica.com/?p=1861108 #arstechnicavideos #edgeofknowledge #blackholes #darkenergy #darkmatter #paulsutter #science