From Wikipedia, the free encyclopedia

The Spitzer Space Telescope (formerly the Space Infrared Telescope Facility, SIRTF) is an infrared space observatory launched in 2003. It is the fourth and final of NASA's Great Observatories.

From Wikipedia, the free encyclopedia

The Spitzer Space Telescope (formerly the Space Infrared Telescope Facility, SIRTF) is an infrared space observatory launched in 2003. It is the fourth and final of NASA's Great Observatories.


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