77K views · 4.1K reactions | Our Spitzer Space Telescope's mission comes to an end today, after 16 years of discoveries. As one of our Great Observatories, Spitzer's superpower was observing the universe in infrared light — and revealing its hidden side: https://go.nasa.gov/31jryWB | NASA - National Aeronautics and Space Administration | Facebook

NASA's Spitzer Space Telescope launched on Aug. 25, 2003 and reached its 5,000th day in space on May 3, 2017! Spitzer's job is to study the universe in the infrared, and it's the last mission of the NASA Great Observatories program, which saw four specialized telescopes (including the Hubble Space Telescope) launched between 1990 and 2003. Learn more about this awesome science tool in the video below from NASA/JPL-Caltech and here: https://goo.gl/aW3elJ | Space.com

After 16 years of amazing infrared discoveries throughout the cosmos, NASA's Spitzer Space Telescope mission is coming to end. We will host a live program at 1 p.m. ET on Jan. 22 to celebrate the far-reaching legacy of one of our four Great Observatories. https://go.nasa.gov/38emGUJ | NASA - National Aeronautics and Space Administration