The desire to detect possible variations of the total solar irradiance (TSI), the total amount of power supplied to the Earth from the Sun by radiative means, has been a goal for more than a century. Interest in this quantity arose from a realization that it is a determining factor of the Earth’s climate. At any time in the Earth’s history the atmospheric composition and the distribution of oceans and land masses combine with the solar irradiance to determine the radiative balance, and hence the climate, of the Earth’s biosphere.
KeywordsConvection Mercury Europe Attenuation Helium
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