Dark Energy Instrument’s Lenses See Sky for the First Time

The dome of the Mayall Telescope opened to the night sky Monday and starlight poured through the assembly of six large lenses. The first focused images with these precision lenses marked an important “first light” milestone for the Dark Energy Spectroscopic Instrument, or DESI. https://newscenter.lbl.gov/2019/04/03/dark-energy-instruments-lenses-see-night-sky-first-time/