NASA’s Fermi Gamma-ray Space Telescope has identified the farthest gamma-ray blazars, a type of galaxy whose intense emissions are powered by supersized black holes

NASA’s Fermi Gamma-ray Space Telescope has identified the farthest gamma-ray blazars, a type of galaxy whose intense emissions are powered by supersized black holes
The dual-star system produces a cyclic flood of gamma rays, the highest-energy form of light
Astronomers are gearing up for high-energy fireworks due in just under three years