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en.wikipedia.org/wiki/Solar_luminosity

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.One nominal solar luminosity is defined by the International Astronomical Union to be 3.828 × 10 26 W. This does not include the solar neutrino luminosity ...

www.reference.com/science/luminosity-sun-c419abf2e2848d74

According to the Sun Fact Sheet made available by NASA, the luminosity of the Sun is approximately 3.84 * 10^26 joules per second. This is the same as 3.84 * 10^26 watts. According to the University of Oregon, the luminosity of the Sun is derived by multiplying the intensity of the sunlight received at the Earth by the amount of sunlight that ...

The absolute luminosity is about 3.839×1026 W, or 3.839×1033 erg/second.The comparative luminosity of an astronomical object is based on the Sun, so it has a relative luminosity of 1.

A solar luminosity is equal to the current luminosity of the Sun, which is 3.839 Ã 10 26 W, or 3.839 Ã 10 33 erg/s. So dividing one solar luminosity with the Suns luminosity gives 1.

en.wikipedia.org/wiki/Luminosity

In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object. As a term for energy emitted per unit time, luminosity is synonymous with power.. In SI units luminosity is measured in joules per second or watts.Values for luminosity are often given in the terms of the luminosity of the Sun, L ⊙.

eaae-astronomy.org/WG3-SS/WorkShops/SunLuminosity.html

The main interest of this workshop is to see how we can get values for the Sun's luminosity and surface temperature, by using simple methods. The participants will share experiments in which the Sun's radiation is measured, leading to the value for the Sun's luminosity.

www.thoughtco.com/what-is-luminosity-3072289

Astronomers determine a star's luminosity by looking at its size and its effective temperature. The effective temperature is expressed in degrees Kelvin, so the Sun is 5777 kelvins. A quasar (a distant, hyper-energetic object in the center of a massive galaxy) could be as much as 10 trillion degrees Kelvin.