Even though scientists were aware of its potential, infrared astronomy, which involves observations of infrared radiation found at frequencies just below the limit of human eyesight, did not really become possible without recent technology.

Astronomers in the 1970s began making observations of the sky using infrared detectors, but in order to produce an image laborious exposure over the course of dozens of nights was necessary. Even then, the infrared detectors produced thousands of small images that had to be pieced together to form a larger image, which lacked detail.

The situation improved in the 1980s when large infrared detectors were developed for military use. Astronomers were able to adapt these new instruments for their own purposes. The new devices are tuned to specific "near" or "far" infrared wavelengths. Combined with satellite technology, these new sensing devices are beginning to open new doors on the universe.

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