Yesterday was the 14th anniversary of the launch of NASA's Spitzer Space Telescope
. [Artist's conception of the telescope against an infrared sky]
It's an infrared telescope whose main mission finished in 2009 when it ran out of the coolant that's needed to keep it at an operating temperature. However one of the instruments is still functioning and continues to provide valuable data. The mission was renamed the Spitzer Warm Mission and redirected to its current capabilities.
The telescope was named in honor of Lyman Spitzer, an astronomer who had promoted the concept of space telescopes in the 1940s.