Questions for “Huge arc of galaxies is surprising and puzzling cosmologists”
![Sloan Digital Sky Survey telescope](https://www.snexplores.org/wp-content/uploads/2021/06/060921_lg_giant-space-arc_feat.jpg)
Observations of thousands of galaxies taken by the Sloan Digital Sky Survey system (pictured) helped reveal what seems to be a giant arc of galaxies. That arc is more than 3 billion light-years long.
Patrick Gaulme/Sloan Digital Sky Survey (CC BY 4.0)