🗺️ Watch the DESI survey footprint grow.
Each point is a galaxy or quasar helping build the largest 3D map of the Universe ever made.
DESI completed its planned survey area on April 15, 2026 — ahead of schedule.
47M+ objects mapped and counting.
🌌 Major milestone for DESI: full originally planned survey footprint was completed on April 15, ahead of schedule!
47M+ galaxies & quasars mapped → the largest 3D map of the Universe ever made.
Keep posted: Observations continue through 2028.
More: tinyurl.com/Y5DESI
#DESI
Alongside this release, we have also released two new value-added catalogues supplementing the older Data Release 1 announced in March.
These datasets, available ahead of the full DR2 release, include the MCMC cosmology chains used to infer cosmological parameters, along with best-fit values and supporting information. They allow researchers everywhere to reproduce DESI’s results and explore new analyses.
To mark the publication of the first DESI DR2 BAO cosmology papers in Physical Review D, the DESI Collaboration has released the full set of cosmology chains and data products supporting these results.
🌌 DESI DR2 cosmology chains and data products are now public!
✨ The award includes an invited prize lecture at the 247th AAS meeting in Phoenix. DESI member Daniel Eisenstein will accept on behalf of the collaboration and deliver the closing plenary on 8 January 2026.
This annual award recognizes highly meritorious work in astronomy. The 2026 prize honors DESI for two landmark papers published this year:
🔹 February 2025: BAO results from DESI’s DR1 data.
🔹 March 2025: BAO results from 14 million galaxies and quasars observed in DESI DR2.
🌟 We’re proud to share that the DESI Collaboration has been awarded the 2026 Lancelot M. Berkeley–New York Community Trust Prize by the American Astronomical Society (AAS) — read more on the AAS website aas.org/press/desi-c... 🎉
DESI scientists propose non-singular black holes convert baryonic matter into dark energy as massive stars collapse, growing with the expanding Universe. This fits dark energy data and allows positive neutrino masses, consistent with particle physics.
🕳️✨ What if black holes don’t just swallow matter… but transform it into dark energy?
From Python coding to probing dark energy, #DESIHigh brings cosmology to the classroom. Next stops: more events + new tutorials!
🔗 desi.lbl.gov #STEM #Cosmology #DarkEnergy #Astrophysics
🚨 DESI High is back! 🚀🌌
High school students in Mexico & Spain recently explored the universe using real data from the Dark Energy Spectroscopic Instrument. 🔭💻
The @desisurvey.bsky.social makes a precise 3D map of galaxies to explore 11 billion years of cosmic history. Saul Perlmutter, Berkeley Lab scientist and Nobel laureate, shares what the experiment’s recent #DarkEnergy results mean for our big picture of the universe.
🎧 via @theguardian.com ⬇️
DESI 2025 - Cosmology Results from DR2 BAO (Garcia-Quintero & Martini) 😍☄️🔭🚀 youtu.be/YiRaDtslycE?... via YouTube with @justshaun.bsky.social 🎙️
Further details are available in our guide to the publications: www.desi.lbl.gov/2025/03/19/d...
Check out the new key papers and supporting papers available here: data.desi.lbl.gov/doc/papers/
🔊 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.
A blocky lambda symbol crumbles as it is pulled apart by creatures representing Baryon Acoustic Oscillations, the Cosmic Microwave Background, and supernovae. Caption reads "something has to give..." Credit: Claire Lamman
DESI's DR2 BAO results are out!!
TL;DR... 1/n
@desisurvey.bsky.social
This is starting to look believable (to me at least 😅)
*Something* is certainly going on...
Great work @desisurvey.bsky.social!
youtu.be/YiRaDtslycE
A long-exposure image captures circular star trails above telescope domes illuminated in red light on a dark mountain. A golden glow on the horizon marks distant city lights.
A person reaches out a tool to clean a large mirror, surrounded by an intricate framework of metal structures.
DESI’s instrument, a long black cylinder supported by the metal framework of the telescope, points at the domed ceiling.
🔭👀 New results from the @desisurvey.bsky.social strengthen hints that #DarkEnergy might evolve.
News release ⬇️
newscenter.lbl.gov/2025/03/19/n...
#Space #arXiv 🧪
🌠 Stay tuned as we continue to share highlights from these groundbreaking results!
🎥 Exclusive videos from DESI scientists breaking down today’s new releases are now available on the DESI YouTube channel [ www.youtube.com/@DESISurvey ].
📖 Read more on our website [ www.desi.lbl.gov ] and in the @berkeleylab.lbl.gov press releases [ newscenter.lbl.gov/2025/03/19/d... ] [ newscenter.lbl.gov/2025/03/19/n... ] for a high-level overview of DR1 and BAO measurements from DR2.
These results strengthen hints toward evolving dark energy, with major implications for our understanding of the nature and fate of the universe.
At the same time, new results from the first 3 years of DESI data – DR2 BAO measurements – are now available:
✨ BAO measurement from galaxies and quasars
✨ BAO measurement from Lyman-alpha forests
The first 13 months of data from our main survey are now publicly available! While this is only a fraction of what DESI will capture, it already contains more than twice as many unique objects beyond our galaxy as all previous 3D spectroscopic surveys combined [ data.desi.lbl.gov/doc/releases/ ].
JUST RELEASED: DESI DR1 & BAO RESULTS FROM DR2🌌
