On November 19, DESI released another set of papers based on year one (Y1) data. The first set of papers, summarized here, was released on April 4 and focused on a particular feature seen in the clustering of tracers called the Baryon Acoustic Oscillation (BAO) standard ruler. These new results provide an extended, “full-shape” analysis […]
Main Content
The Dark Energy Spectroscopic Instrument (DESI)
The Dark Energy Spectroscopic Instrument (DESI) will measure the effect of dark energy on the expansion of the universe. It will obtain optical spectra for tens of millions of galaxies and quasars, constructing a 3D map spanning the nearby universe to 11 billion light years.The DESI Survey is being conducted on the Mayall 4-meter telescope at Kitt Peak National Observatory. DESI is supported by the Department of Energy Office of Science to perform this Stage IV dark energy measurement using baryon acoustic oscillations and other techniques that rely on spectroscopic measurements.
First Cosmology Results from DESI
DESI has created the largest 3D map of our universe. The Universe’s expansion history is now known to better than 1% precision, yielding the best picture yet of how the universe has evolved over the past 11 billion years. Read more in our announcement and the April 2024 BerkeleyLab Press Release. Our results were presented at the APS and Moriond meetings as well as on Youtube.
The results — which provide one of the most stringent tests yet of how gravity behaves at cosmic scales — line up with Einstein’s theory of general relativity. Read more in the November 2024 BerkeleyLab Press Release. Further details are available in our guide to the publications reporting these results.
DESI Science
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5000 Eyes: Mapping the Universe with DESI is out now!
DESI's very own planetarium show is available for free to all planetariums. See the trailer and find more information here.
Translations in French, Spanish, Mandarin, and German are now available.
Highlights
DESI Begins
Latest Blog Posts
All is Not Lost: Tiny Groups of Galaxies Remember Their Origins
A graduate student at the Harvard-Smithsonian Center for Astrophysics, Claire Lamman studies the orientations and alignments of galaxies and what they can tell us about cosmology and the cosmic web. She is also a talented artist and the recipient of a National Academies of Sciences Excellence in Science Communication Award for work that includes the […]
“5000 Eyes” Premieres in Mexico City
by Andrea Muñoz Gutiérrez On 20 June 2024, the DESI planetarium show “5000 Eyes” premiered in Mexico City at the Luis Enrique Erro Planetarium. Previously shown in traveling planetariums across the country, it is now, for the first time, part of the regular programming at the oldest planetarium in the nation. Authorities from several DESI […]
Latest Press Releases
DESI Early Data Release Holds Nearly Two Million Objects
Lawrence Berkeley National Laboratory, 13 June 2023
New DESI Planetarium Show to Premiere in 2023
Lawrence Berkeley National Laboratory, 27 February 2023
DESI Resumes Cataloguing the Cosmos
Lawrence Berkeley National Laboratory, 7 October 2022
Dark Energy Spectroscopic Instrument Creates Largest 3D Map of the Cosmos
Lawrence Berkeley National Laboratory, 13 January 2022