gamma-rays

In 2010, NASA's Fermi telescope found two colossal gamma-ray structures erupting from the center of the Milky Way, each 25,000 light-years tall. In 2020, an X-ray telescope found even larger versions of the same structures. Nobody fully agrees on what made them.

NASA's Fermi telescope mapped the gamma-ray universe, revealing pulsars, black holes, and mysterious transient events at highest photon energies.