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ESO Signs Contracts for the ELT’s Gigantic Primary Mirror
Jesse Rogerson, PhD
Ingenium - Canada's Museums of Science and Innovation
Jul 25, 2017
Looks like progress for the European Southern Observatory's Extremely Large Telescope. Two contracts were awarded to companies to build and test the 39 mirror segments (each 1.4 meters across). Once completed, ELT will be the largest optical telescope on the planet.