Great Observatories program
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series of space telescopes
~25 min read
Encyclopedic overview
Four Great Observatories
NASA's series of Great Observatories satellites are four large, powerful space-based astronomical telescopes launched between 1990 and 2003. They were built with different technology to examine specific wavelength/energy regions of the electromagnetic spectrum: gamma rays, X-rays, visible and ultraviolet light, and infrared light.
Excerpted from Wikipedia’s “Great Observatories program” article, available under the CC BY-SA 4.0 licence.