#dark-energy — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #dark-energy, aggregated by home.social.
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#KnowledgeByte: Combining the #DarkEnergy Spectroscopic Instrument (#DESI) data with other experiments shows signs that the impact of dark energy may be weakening over time — and the standard model of how the #Universe works may need an update.
https://knowledgezone.co.in/posts/Is-Dark-Energy-Getting-Weaker-67f3f552da225d23b99cb17a
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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!
#CosmicWeb #Cosmology #DarkEnergy #DarkEnergySpectroscopicInstrument #DESI #GalaxyRedshiftSurveys -
NASA Scientist Investigates the Possibility of a Hidden Fifth Force in Our Solar System
📰 Original title: NASA scientist says a "fifth force" may be hiding in our solar system
🤖 IA: It's not clickbait ✅
👥 Usuarios: It's not clickbait ✅View full AI summary: https://killbait.com/en/nasa-scientist-investigates-the-possibility-of-a-hidden-fifth-force-in-our-solar-system/?redirpost=cb61d7a8-a8bc-45c6-94f5-3fab35cf134b
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Roman, Hubble’s 300-Megapixel Successor, Will Map the Universe https://petapixel.com/2026/04/22/roman-hubbles-300-megapixel-successor-will-map-the-universe/ #nancygraceromanspacetelescope #spacetelescope #astrophysics #darkenergy #darkmatter #astronomy #telescope #universe #hubble #Space #NGRST #roman #News #NASA
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#science #physics #darkmatter #darkenergy
Pretty cool stuff here for anyone interested in cosmology.
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The flimsy case for evolving dark energy There's been a lot of talk about evolving dark energy, and how DESI data demands it. But the case for this remains somewhat weak, while the true underlying puzzles remain unsolved. bigthink.com/starts-with-... #physics #astro #space #darkenergy
The flimsy case for evolving d... -
Cosmological Models Are In Trouble After Recent Studies on Dark Energy - YouTube
https://www.youtube.com/watch?v=NK-4TViTilU -
New Mathematical Proof for a Universe Powered by Black Holes - YouTube
https://www.youtube.com/watch?v=-osSjxFTMv0 -
Introducing NASA's Roman Space Telescope
#DarkEnergy #DarkMatter #Exoplanet #NancyGraceRomanSpaceTelescope
⏩ 1 new picture and 1 new video from NASA (SVS) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20260308125620
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The Universe’s Greatest Mystery, a thoughtful dive into the mysterious force driving our cosmos apart. From Newton and Einstein to modern theories breaks down how dark energy reshapes our understanding of cosmos.
https://formulon.blog/2026/02/11/understanding-dark-energy-the-universes-greatest-mystery/ -
Core Survey by NASA’s Roman Mission Will Unveil Universe’s Dark Side https://www.nasa.gov/missions/roman-space-telescope/core-survey-by-nasas-roman-mission-will-unveil-universes-dark-side/ #NASA #NancyGraceRomanSpaceTelescope #DarkEnergy #DarkMatter #Galaxies #GoddardSpaceFlightCenter #TheMilkyWay #TheUniverse
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🌌🔭 Dark Energy Survey’s grand finale! After 6 years mapping 669 million galaxies, scientists release the most comprehensive analysis yet—twice as tight on cosmic expansion, aligning with the standard ΛCDM model (constant dark energy). A dream come true for cosmology, paving the way for future discoveries! Read more: https://phys.org/news/2026-01-dark-energy-survey-scientists-analysis.html
#GoodNews #DarkEnergy #UniverseExpansion #CosmologyWin #ScienceBreakthrough
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While the holy grail of #InhomogeneousCosmology is to explain #DarkEnergy as an epiphenomenon of the cosmologically recent formation epoch of #CosmicVoids and other #LargeScaleStructure, #YonadavBarryGinat and #PedroGFerreira have gone for a more modest goal: keeping the #CosmologicalConstant but tacking on void formation to get a sort-of #BeyondLCDM inhomogeneous model that better matches #DES and #DESI results [1].
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String theory finally found a way to describe a universe with dark energy. https://www.quantamagazine.org/string-theory-can-now-describe-a-universe-that-has-dark-energy-20260102/ #stringtheory #darkenergy #cosmology #STEM #scifi
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What was it like when #DarkEnergy rose to prominence? : Medium
#AI could be your next line #Manager : Misc
Why #Europa Might Not Have #Life After All : Misc
Latest #KnowledgeLinks
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Dark Energy Survey Year 6 Results - Cosmological Constraints from Galaxy Clustering and Weak Lensing: https://arxiv.org/abs/2601.14559 -> Dark Energy Survey Scientists Release Analysis of All Six Years of Survey Data: https://news.fnal.gov/2026/01/dark-energy-survey-scientists-release-new-analysis-of-how-the-universe-expands / https://noirlab.edu/public/news/noirlab2603/ - four methods for studying #DarkEnergy come together in a single experiment for the first time. Also Dark Energy Survey - DESI-Independent Angular BAO Measurement: https://arxiv.org/abs/2601.14864. And CosmoSlider - An educational tool for cosmology: https://arxiv.org/abs/2601.16919
