The DESI Survey will measure the properties of Dark Energy using a survey of 30+ million galaxy redshifts.
DESI Survey
Loading...
🔭 This timelapse shows DESI scanning the sky from Kitt Peak.
Its efficiency enabled completion of the original survey footprint (in red) ahead of schedule. Moving circle shows where DESI points.
47M+ galaxies mapped so far → the largest 3D map of the Universe ever made. Will continue until 2028.
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.
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.
🗺️ 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.
🌌 DESI DR2 cosmology chains and data products are now public!
DESI's largest 3D map of the Universe is in today's NASA APOD
A slice of the cosmic web, with galaxies tracing structure across billions of years - explained.
@clairelamman.bsky.social | DESI Collaboration
apod.nasa.gov/apod/ap26042...
🌌 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
🔗 Explore the full announcement and access the data here: www.desi.lbl.gov/2025/10/06/d...
🔭 At the Mayall Telescope. DESI maps the Universe night after night probing dark energy.
47M+ galaxies observed, with the original survey footprint surpassed Apr 15, 2026—creating the largest 3D map of the Universe ever made.
Credit: Marilyn Sargent/Berkeley Lab
#DESI #Astronomy #NightSky #KittPeak
