The Dark Energy Spectroscopic Instrument maps distant objects in the universe to study dark energy. The instrument is installed on the Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory in Arizona, shown here beneath star trails captured in a long-exposure image. (Credit: KPNO/NOIRLab/NSF/AURA/B. Tafreshi) A new analysis of data collected over three years […]
