English:
On September 20, 1979, the Marshall Space Flight Center’s third and final High Energy Astronomy Observatory (HEAO-C) was launched from Kennedy Space Center aboard an Atlas-Centaur vehicle. Known as
HEAO-3
after its insertion into orbit, HEAO-C continued the program’s mission of probing the electromagnetic spectrum beyond the X-ray level, discovering a multitude of gamma and cosmic rays.
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Utilizing a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment to bring images of supernova remnants, pulsars, and distant galaxies into focus, the three HEAO missions propelled forward the then emerging field of high energy astrophysics.
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The HEAO-3 project was managed by Marshall Space Flight Center in Huntsville, Ala., with RW Inc. serving as the primary contractor.