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Gravitational Lens B0218+357

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Published on Jan 6, 2014

This movie illustrates the components of a gravitational lens system (a kind of natural telescope formed when a rare cosmic alignment allows the gravity of a massive object to bend and amplify light from a more distant source) known as B0218+357. Different sight lines to a background blazar result in two images that show outbursts at slightly different times. NASA's Fermi Gamma-ray Space Telescope made the first gamma-ray measurements of this delay in a lens system.

For more information: http://www.nasa.gov/press/2014/januar...

This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/vis/a010000/...

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