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iCandy: Checking Things Out

A space telescope's mirror array, a liquid scanner at airports, and a body-mounted video camera are among the tools for examining what's around us

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Photo: David Higginbotham/NASA/Redux
These six hexagons represent one-third of the primary mirror array that will allow the James Webb Space Telescope to capture images of objects in the deep reaches of space. The mirrors are being prepped for cryogenic testing at NASA’s Marshall Space Flight Center to ensure that they can stand up to the subzero temperatures they’ll be exposed to in space.

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