CGRO (Compton Gamma-Ray Observatory), one of NASA's Great Observatories, studied the gamma-ray sky using four telescopes that detected different energies. The mission found a class of active galaxies called blazars, mapped the Milky Way’s distribution of a radioactive isotope of aluminum, and hinted at gamma-ray bursts’ cosmological origins, among other discoveries.
NASA's Compton Gamma Ray Observatory just before release from the space shuttle Atlantis on April 7, 1991, during the STS-37 mission. Compton's successful career ended in June 2000 when the observatory reentered Earth's atmosphere.
NASA Celebrates 25 Years of Breakthrough Gamma-ray Science
Twenty-five years ago this week, NASA launched the Compton Gamma Ray Observatory, an astronomical satellite that transformed our knowledge of…