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2. Solar constant - Wikipedia

   en.wikipedia.org/wiki/Solar_constant

   The solar "constant" is not a physical constant in the modern CODATA scientific sense; that is, it is not like the Planck constant or the speed of light which are absolutely constant in physics. The solar constant is an average of a varying value. In the past 400 years it has varied less than 0.2 percent. [2]

3. Sun - Wikipedia

   en.wikipedia.org/wiki/Sun

   The solar constant is the amount of power that the Sun deposits per unit area that is directly exposed to sunlight. The solar constant is equal to approximately 1,368 W/m 2 (watts per square meter) at a distance of one astronomical unit (AU) from the Sun (that is, at or near Earth's orbit). [99]

4. Astronomical constant - Wikipedia

   en.wikipedia.org/wiki/Astronomical_constant

   The astronomical unit of time is a time interval of one day (D) of 86400 seconds.The astronomical unit of mass is the mass of the Sun (S).The astronomical unit of length is that length (A) for which the Gaussian gravitational constant (k) takes the value 0.017 202 098 95 when the units of measurement are the astronomical units of length, mass and time.

5. List of physical constants - Wikipedia

   en.wikipedia.org/wiki/List_of_physical_constants

   The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured. Many of these are redundant, in the sense that they obey a known relationship with other physical ...

6. IAU (1976) System of Astronomical Constants - Wikipedia

   en.wikipedia.org/wiki/IAU_(1976)_System_of...

   The astronomical unit of length is known as the astronomical unit (A or au), which in the IAU(1976) system is defined as the length for which the gravitational constant, more specifically the Gaussian gravitational constant k expressed in the astronomical units (i.e. k 2 has units A 3 S −1 D −2), takes the value of 0.017 202 098 95. This ...

7. Catching the Sun (film) - Wikipedia

   en.wikipedia.org/wiki/Catching_the_Sun_(film)

   A profile on Zhongwei Jiang, a Chinese entrepreneur based in Wuxi, China gives perspective on solar growth in Germany, India, and China. Jiang, who grew up without electricity until the age of eight, founded the solar company WesTech in 2003. [3] Jiang conducts an international business in solar products and dreams of a "Solar City" in Texas. [4]

8. Kaye and Laby - Wikipedia

   en.wikipedia.org/wiki/Kaye_and_Laby

   Tables of Physical and Chemical Constants and Some Mathematical Functions is a scientific reference work. First compiled and published in 1911 by the physicists G. W. C. Kaye and T. H. Laby , it is more commonly known as Kaye and Laby . [ 1 ]

9. Solar luminosity - Wikipedia

   en.wikipedia.org/wiki/Solar_luminosity

   Evolution of the solar luminosity, radius and effective temperature compared to the present-day Sun. After Ribas (2010) [1] The solar luminosity (L ☉) is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.