en.wikipedia.org/wiki/Luminosity

The Stefan–Boltzmann equation applied to a black body gives the value for
luminosity for a black body, an idealized object ...

astronomyonline.org/Science/Luminosity.asp

Science - Formulas. ... Physics - Formulas - Luminosity ... if we know distance and
brightness of a star, we can determine its Luminosity (or actual brightness):.

janus.astro.umd.edu/astro/equations/help.html

This equation allows you to find the energy of a moving object if its mass and
velocity are ... VARIABLES: L, is Luminosity of the emitter, (in Joules per second).

astro.unl.edu/classaction/questions/stellarprops2/ca_stellarprops2_luminosity.html

Luminosity Formula. The student is given the radius/temperature/luminosity of a
star as compared to the sun and is asked to determine what the ...

www.e-education.psu.edu/astro801/content/l4_p4.html

The difference between luminosity and apparent brightness depends on distance
. ... Thus, the equation for the apparent brightness of a light source is given by ...

www.idialstars.com/april2013.htm

The luminosity of a star depends upon radius and surface temperature. ... In the
equation below L = luminosity and R = radius. Let's say the radius of the star is 5
...

www.ask.com/youtube?q=Luminosity Formula&v=CaE-OhJetkw

Dec 26, 2012 ... Luminosity of a Star. ... Introductory Astronomy: Luminosity, Temperature, and
Surface Area - Duration: 16:15. P.E. Robinson 5,824 views. 16:15.

www.astro.cornell.edu/academics/courses/astro201/mag_absolute.htm

The brightness of a star of a given luminosity L, radiated in all directions, falls ...
The basic formula relating the apparent (m) and absolute (M} magnitudes then is.

www.atnf.csiro.au/outreach/education/senior/astrophysics/photometry_luminosity.html

How is this equation derived? It is simply an application of the luminosity ratio
relationship (4.7).

cas.sdss.org/dr4/en/proj/advanced/hr/radius1.asp

The luminosity of a star is given by the equation. L = 4pR<sup>2</sup>s T<sup>4</sup>,. Where L is the
luminosity in Watts, R is the radius in meters, s is the Stefan-Boltzmann constant