UA optical scientists are set to begin almost two years of high-precision polishing and grinding work on a 4.3-meter mirror that will form the core of a $40 million Discovery Channel telescope near ...

Manufacturing of the James Webb Space Telescope (JWST) progressed further with the delivery of the telescope’s first mirror segment for grinding and polishing in late September. Northrop Grumman ...

Why build a telescope? YOLO, as the kids say. Having decided that, one must decide what type of far-seer one will construct. For his 10″ reflector, [Carl Anderson] once again said “Yolo”— this time ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. George Willis Ritchey built this ...