After more than 16 years studying the universe in infrared light, revealing new wonders in our solar system, our galaxy, and beyond, NASA's Spitzer Space Telescope's mission has come to an end. Slide through to see some of our favorites from the mission, and learn more about Spitzer’s final days and legacy at nasa.gov/Spitzer Credit: NASA #nasa #spitzer #spacetelescope #solarsystem #exploration #mission #spacesaturday