Tag Archive for 'Quadruple quasar'

This image shows the quadruple quasar SDSS J0841+3921 (quasars are indicated by arrows). Image credit: Joseph Hennawi / Fabrizio Arrigoni-Battaia.

Astronomers Discover First Quadruple Quasar

May 15, 2015 by News Staff

Astronomers using two 10-m optical/infrared telescopes at the W. M. Keck Observatory have discovered the first quadruple quasar, catalogued as SDSS J0841+3921. This...