Spitzer Space Telescope Celebrates 5th Birthday With Portrait of…

NASA's Spitzer Space Telescope, the last of the space agency's Great Observatories » 8/23/08 8:00pm 8/23/08 8:00pm satellites to launch, celebrated its fifth birthday recently... giving me the opportunity to post this amazing multigenerational picture of star-forming region in the constellation Cassiopeia, 6,500 light-years from Earth. The photo…