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Electromagnetic spectrum
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The electromagnetic spectrum. The human eye can only see a limited range of the spectrum, whereas satellites can register visible, infrared and a large range of other wavelengths.

Credits: ESA
 
  Radiation and temperature
 
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Radiation and temperature
The maximum emission of the Sun is in the wavelength of 0.483 micrometres, whereas that of the Earth is at 14 micrometres.

Credits: ESA
 


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