The Spitzer Space Telescope is the final mission in NASA's Great Observatories Program - a family of four space-based observatories, each observing the Universe in a different kind of light. The other missions in the program include the visible-light Hubble Space Telescope, Compton Gamma-Ray Observatory, and the Chandra X-Ray Observatory. Spitzer was launched on August 25, 2003. Spitzer is being used to study phenomena ranging from our Solar System to the distant reaches of the Universe, and represents an important scientific and technical cornerstone of NASA's Astronomical Search for Origins Program. The Spitzer Science Center (SSC) is located within IPAC at the California Institute of Technology. The SSC is responsible for science operations for the astronomical community including proposal planning, observation planning, observation scheduling, data processing, data archiving, data reduction support, public affairs and education and public outreach.