NASA's Spitzer Space Telescope (Mission Overview)

Much has been learned from the Space Telescopes that have been commissioned over the years... Hubble completed its mission quite admirably and Now the Spitzer Infrared Space Telescope has completed its mission... I found a good short science video that provides a snapshot of what Spitzer has accomplished... There are many more videos out there, some longer and some shorter, but this will suffice to provide a quick overview of what it has done for mankind...

From NASA Jet Propulsion Laboratory:
After 16 years of unveiling the infrared universe, NASA's Spitzer Space Telescope has left a singular legacy. As one of NASA’s four Great Observatories -- a series of powerful telescopes including Hubble, Chandra and Compton that can observe the cosmos in different parts of the electromagnetic spectrum --Spitzer quickly became a pioneer in the exploration of the worlds beyond our human vision. From stars being born to planets beyond our solar system (like the seven Earth-size planets around the star TRAPPIST-1), Spitzer's science discoveries will continue to inspire the world for many years to come."

ENJOY!!!