Black holes might all have hearts of pure darkness, but many cloak themselves in rings of fire that blaze like little else in ...

By combining data from NASA’s IRAS and NuSTAR telescopes, scientists have uncovered more hidden supermassive black holes than earlier estimates suggested. Their findings indicate that over a third of ...

Astronomers have identified a quasar that may help explain how the universe’s “dark ages” finally ended. Astronomers have ...