Large, all-glass metalens images sun, moon and nebulae

https://seas.harvard.edu/news/2024/01/metalens-meets-stars

"smaller than light wavelength imaging now high -resolution -aspect ratio imaging sun, moon... conventional CMOS fabrication... deep-UV projection lithography projects and forms 10's billions nanopillar paterns stiched together etched into 10-cm-diameter glass metalens... stitch together several patterns of nanopillars... dividing lens into 25 sections using 7 patterns 18.7 billion designed nanostructures... extreme heat, cold and vibrations of space launch... telecommunications, directed energy transport, large VR/ AR metalenses"