Insolation and Total Solar Irradiance
Total solar irradiance is defined as the amount of radiant energy emitted by the Sun over all wavelengths that fall each second on 11 ft2 (1 m2) outside Earth�...
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Solar Sunspot Cycle
A sunspot is an area of the Sun's photosphere, appearing darker to the eye than surrounding areas of the Sun. Although very hot by any terrestrial standard, sunspot regions ...
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Insolation and Total Solar Irradiance