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Summary
DescriptionThe E-ELT Primary Mirror.jpg
English: The 42-metre primary mirror of the European Extremely Large Telescope will consist of almost 1000 hexagonal segments, each 1.4 metres wide, but only 50 mm thick.
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{{Information |Description={{en|1=The 42-metre primary mirror of the European Extremely Large Telescope will consist of almost 1000 hexagonal segments, each 1.4 metres wide, but only 50 mm thick. }} |Source=[http://
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