Fermi observatory makes first gamma-ray study of a gravitational lens
Monday, January 6, 2014 - 17:00
in Astronomy & Space
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.