Jointly owned by NASA, Department of Energy US, Germany, Japan, Sweden, France and Italy – the Fermi Gamma-Ray Space telescope currently sits in a low Earth orbit. The uniqueness of this space ferrying telescope is that it can detect the most powerful radiations emanating through our visible universe. This allows it to spot supermassive black holes, supernovae emissions as well as collisions of neutron stars. Such radiations unfortunately cannot be detected from Earth stationed observatories thanks to the atmospheric shield. But the Fermi Gamma-Ray telescope in its low Earth orbit is outside the shield and thus takes perfect readings.
Fun fact about the telescope is that the name was supposed to be Gamma Ray Large Area Space Telescope or in short GLAST! Then NASA decided that it was a mouthful so they wanted something more relatable to the concept of the telescope and what it was meant to do. Finally, the name Fermi stuck and thus it became known as Fermi Gamma-Ray Telescope.