Infrared observatory, set to launch this weekend, may yield insights into universe

After a four-month delay, the US is set to loft the last in a set of orbiting observatories that are revolutionizing humanity's understanding of the universe.
If all goes as planned, Sunday morning, the National Aeronautics and Space Administration (NASA) will launch the one-ton Space Infrared Telescope Facility (SIRTF) from Florida's Kennedy Space Center. It's the final piece of NASA's Great Observatory series, which includes the Hubble Space Telescope, the Compton Gamma Ray Observatory, and the Chandra X-Ray Observatory...