Lensing Diagram (IMAGE) University of Wisconsin-Madison Caption Light from the distant quasar 7.9 billion light-years away is bent and magnified in this schematic view by the foreground galaxy's mass 4.6 billion light-years away in a phenomenon called 'gravitational lensing.' Sight lines toward images A and B probe different magnetic fields and gas conditions through different parts of the lensing galaxy. Credit Courtesy of Sui Ann Mao Usage Restrictions Credit to Sui Ann Mao License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.