A NASA team has attached nearly all of the hexagonal segments that will together make the primary mirror for the James Webb Space Telescope (pictured are practice segments). Chris Gunn/NASA hide caption

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Massive Space Telescope Is Finally Coming Together

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Larkin Carey, an optical engineer with Ball Aerospace, examines two test mirror segments designed for the James Webb Space Telescope. The mirror for the scope is extremely powerful, but heavy and pricey. NASA hide caption

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Could Glitter Help Solve NASA's Giant Telescope Problem?

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