Galaxies may be aligned across 1 billion light-years
Distant quasars raise questions about formation of large structures in the universe
![quasar jets align with galaxies](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/11/cc_eso1438a.jpg?fit=860%2C460&ssl=1)
GALACTIC LINEUP Quasar jets (white lines) align with one another and the billion-light-year-long rivers of galaxies they inhabit (blue) in this artist’s illustration.
ESO/M. Kornmesser