First quasar quartet discovered
Group of bright objects in early universe lights up an infant galaxy cluster
![four quasars](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/05/cc_quasar_free.jpg?fit=860%2C460&ssl=1)
QUADRUPLETS Four quasars (marked with arrows) lie within a nebula (blue) that stretches 1 million light-years across in this false color image.
J.F. Hennawi and F. Arrigoni-Battaia/MPIA