In a First, Astronomers Find a Blazar That Cycles Every Two Years

Blazar Brightness
After 10 years of observations, scientists have confirmed a two-year cycle in the gamma-ray brightness of a blazar, or a galaxy with supermassive black holes that consume mass and produce high-energy jets as a result. Blazars are the most energetic and luminous objects that we have identified so far in the known universe.“This is the first time that a gamma-ray period has been confirmed in an active galaxy,” Stefano Ciprini, a researcher at the INFN Tor Vergata divi