Great Observatories Program
NASA's series of Great Observatories satellites are four large, powerful space-based telescopes. Each of the Great Observatories has had a similar size and cost at program outset, and each has made a substantial contribution to astronomy. The four missions each examined a region of the electromagnetic spectrum to which it was particularly suited.
Read more about Great Observatories Program: Great Observatories, Strengths, Impact, Synergies, Successors To GO Instruments, Later Programs, Gallery
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