Sky survey
DESI (Dark Energy Spectroscopic Instrument)
Cosmology & Universe
Definition
A spectroscopic survey measuring the redshifts of tens of millions of galaxies to map cosmic expansion and dark energy.
Overview
Mounted on the Mayall Telescope at Kitt Peak, DESI is building the largest 3-D map of the Universe, using baryon acoustic oscillations to trace expansion history. Its early results hint that dark energy may not be perfectly constant.
Operated by
What it measures
Knowledge connections
- MeasuresThe Hubble Constant
- MeasuresBaryon Acoustic Oscillations
- MeasuresDark Energy
- Operated byNSF NOIRLab
Sources & references
The primary and reference sources this topic draws on.
- DESIDark Energy Spectroscopic Instrument
Spectroscopic redshift survey measuring baryon acoustic oscillations and dark energy.
- NSF NOIRLabNSF National Optical-Infrared Astronomy Research Laboratory
Ground-based optical/infrared observatory data and imagery.