1. In 1838, Claude Pouillet made the first estimate of the solar constant . 2. These observations were designed to ascertain the " solar constant of radiation ". 3. Lovelock and Watson demonstrated the stability of Daisyworld by making its solar constant . 4. Solar radiation pressure is calculated from the solar constant . 5. The solar constant is thus expressed at the thermopause. 6. In 1884, Samuel Pierpont Langley attempted to estimate the solar constant from Mount Whitney in California. 7. A 1903 Langley bolograph with an erroneous solar constant of 2.54 calories / minute / square centimeter. 8. He developed a pyrheliometer and made, between 1837 and 1838, the first quantitative measurements of the solar constant . 9. In 1954 the solar constant was evaluated as 2.00 cal / min / sq cm ?2 %. 10. The solar constant includes all wavelengths of solar electromagnetic radiation, not just the visible light ( see Electromagnetic spectrum ).
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