Tag Archive for 'DESI Legacy Surveys'

A slice of the 3D map of galaxies collected in the first year of the DESI survey with annotations identifying key features in the map. Earth is at the tip, with the furthest galaxies plotted at distances of 11 billion light-years. Each point represents one galaxy. This version of the DESI map includes 600,000 galaxies -- less than 0.1% of the survey’s full volume. Image credit: DESI Collaboration / NOIRLab / NSF / AURA / R. Proctor.

DESI Creates Largest 3D Map of Our Expanding Universe Ever

Apr 8, 2024 by News Staff

To study dark energy’s effects over the past 11 billion years, the Dark Energy Spectroscopic Instrument (DESI) has created the largest 3D map of our...

Optical mosaics of 42 galaxies from the SGA-2020 sorted by increasing angular diameter from the top-left to the bottom-right. Galaxies are chosen randomly from a uniform (flat) probability distribution in angular diameter. The horizontal white bar in the lower-left corner of each panel represents 1 arcminute and the mosaic cutouts range from 3.2 to 13.4 arcminutes. This figure illustrates the tremendous range of types, sizes, colors and surface brightness profiles, internal structure, and environments of the galaxies in the SGA. Image credit: CTIO / NOIRLab / DOE / NSF / AURA / J. Moustakas.

Astronomers Create Detailed Atlas of Over 380,000 Galaxies

Oct 19, 2023 by News Staff

The Siena Galaxy Atlas (SGA) is a compilation of data from three surveys completed between 2014 and 2017 known as the DESI Legacy Surveys, which were carried...

An example of a gravitational lens found in the DESI Legacy Surveys data. There are four sets of lensed images in DESI-090.9854-35.9683, corresponding to four distinct background galaxies -- from the outermost giant red arc to the innermost bright blue arc, arranged in four concentric circles. All of them are gravitationally lensed by the orange galaxy at the very center. Image credit: NOIRLab.

Astronomers Discover 1,210 New Strong Gravitational Lenses

Jan 21, 2021 by News Staff

Using a deep residual neural network and data from the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys, astronomers have discovered...