Luminosity of a Star


In astronomy, luminosity is the total amount of energy emitted by a star, galaxy, or other astronomical object per unit time. It is related to brightness, which is the luminosity of an object in a given spectral region.
It has been shown that the luminosity of a star (assuming the star is a black body, which is a good approximation) is also related to temperature and radius of the star by the equation shown.

Related formulas


LLuminosity (W)
Rradius of the star (m)
σStefan-Boltzmann constant
TTemperature of the star (K)