Dark Energy Spectroscopic Instrument in History

Schlegel explains DESI's use of 5,000 robotic fibres to measure galaxy spectra simultaneously and construct a three-dimensional map for dark-energy studies.

Levi directs DESI as its five-year main survey begins mapping millions of galaxies and quasars to track the effect of dark energy across cosmic history.

Schlegel helps oversee DESI as its Early Data Release makes spectra for about 1.8 million unique targets available to the scientific community.

Levi announces DESI first-year cosmology results measuring expansion across 11 billion years and revealing subtle differences that could indicate evolving dark energy.

Schlegel helps present DESI Data Release One, opening public access to a vast spectroscopic map used for precision expansion and dark-energy research.

Levi reports that DESI's first three years strengthen indications that dark energy may evolve with time when combined with other cosmological measurements.

After completing its planned map, Levi oversees continued DESI observations that extend the experiment's ability to test evolving dark-energy models with larger samples.

Levi announces completion of DESI's planned five-year mapping programme, providing the full survey dataset for stronger tests of whether dark energy evolves.