An international team of astronomers, using NASA's Fermi observatory, has made the first-ever gamma-ray measurements of a gravitational lens, 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.
Fuente : http://www.eurekalert.org/pub_releases/2014-01/nsf...
Fuente : http://www.eurekalert.org/pub_releases/2014-01/nsf...