January 6, 2014
Gravitational Lens System
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.
[ Read the Article: NASA Conducts First Ever Gamma-Ray Study Of A Gravitational Lens ]