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Image: Dione's contrasts

Dione reveals its past via contrasts in this view from NASA's Cassini spacecraft. The features visible here are a mixture of tectonics—the bright, linear features—and impact cratering—the round features, which are spread ...

dateAug 23, 2016 in Space Exploration
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X-ray optics on a chip

Waveguides are widely used for filtering, confining, guiding, coupling or splitting beams of visible light. However, creating waveguides that could do the same for X-rays has posed tremendous challenges in fabrication, so ...

dateAug 18, 2016 in Optics & Photonics
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