Quasar PKS 2349, photographed at two different contrast levels. Credit: John Bahcall (Institute for Advanced Study, Princeton) Mike Disney (University of Wales) and NASA/ESA
Quasar 3C 273, coronogaph and normal view. Credit: NASA, J. Bachall, A. Martell, H. Ford, M. Clampin, G. Hartig, G. Illingworth, ACS Science Team, ESA
