But the Spitzer telescope's infrared vision is the keenest ever, thanks to a mirror nearly three feet (0.9 meters) across, sensitive detectors cooled almost to absolute zero, and an orbit far from ...

Ten years ago, a Delta II rocket launched NASA's Spitzer Space Telescope from Cape Canaveral, Fla. As the fourth Great Observatory to enter into space, Spitzer has studied comets and asteroids ...