Giant Magellan Telescope Seventh Primary Mirror Mold and Glass Placement (IMAGE) GMTO Corporation Caption University of Arizona Richard F. Caris Mirror Lab staff members placing chunks of Ohara E6 low expansion glass into a mold for casting the Giant Magellan Telescope's seventh primary mirror segment, September 2023. Credit Damien Jemison, Giant Magellan Telescope – GMTO Corporation Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.