It is Spitzer not Splitzer. It is an infrared observatory
orbiting the sun.
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Wyoming Infrared Observatory was created in 1975.
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The Infrared Astronomical Satellite was the first-ever
space-based observatory to perform a survey of the entire sky at
infrared wavelengths. It uses infrared light.
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Onsala Space Observatory was created in 1949.
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Skysight The Story of SOFIA the Stratospheric Observatory for
Infrared Astronomy - 2005 was released on: