The European Extremely Large Telescope - Why is the E-ELT a 39-metre telescope? -The size of a telescope is important for two reasons: one is the amount of light it can collect
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European Organization for Astronomical Research, E-ELT(European Extremely Large Telescope) 1:140 | Professional Scale Models BV
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European Extremely Large Telescope Mirror Support Photograph by European Southern Observatory/science Photo Library - Pixels
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