Detecting Heat Radiation from Space...

NASA’s Great Observatory Program had an ambitious goal: launch and operate large space telescopes that would allow astronomers to view the universe across the entire electromagnetic spectrum, from gamma rays to the infrared. Whenever possible, the observatories would take complementary data, mapping the galactic plane together or simultaneously viewing a transitory event such as a comet or supernova explosion. In the end, the observatories would create the richest database ever made available to astronomers, allowing them to piece together a more complete view of the universe, using clues taken from one end of the spectrum to the other