Q. Most Stars are cooler than the Sun. These Stars, the Planets, interstellar clouds and Star-forming regions emit most of their radiant energy in the
Solution:
Infrared radiation is emitted by any object that has a temperature (ie radiates heat). So, basically all celestial objects emit some infrared. The wavelength at which an object radiates most intensely depends on its temperature. In general, as the temperature of an object cools, it shows up more prominently at farther infrared wavelengths. This means that some infrared wavelengths are better suited for studying certain objects than others.
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