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Distant Galaxy is Magnified by a Quasar Acting as a Gravitational Lens -- That's a First

07/19/2010 03:45PM

Distant Galaxy is Magnified by a Quasar Acting as a Gravitational Lens -- That's a First

Astronomers using the W. M. Keck Observatory have identified the first known quasar acting as a gravitational lens that magnifies an even more distant galaxy. Hundreds of cases of gravitationally lensed distant quasars with foreground galaxies are known. But, until now, the reverse process - a background galaxy being lensed by a massive foreground quasar - had never been detected. The discovery may provide astronomers with a new technique to study quasars.


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