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Schott Casts First Mirror Segments for ESO’s Extremely Large Telescope

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MAINZ, Germany, Feb. 23, 2018 — The first six hexagonal segments for the main mirror of the European Southern Observatory's (ESO’s) Extremely Large Telescope (ELT) have been successfully cast by glass manufacturer Schott AG. The segments will form parts of the ELT's 39-m main mirror, which will have 798 segments in total when completed. The ELT will be the largest optical telescope in the world when it sees first light in 2024. ESO has awarded Schott with contracts to manufacture the blanks of the first four ELT mirrors. The 39-m diameter primary mirror of the ELT will be the largest ever made for an...Read full article

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