Luminosity is the total radiative energy emitted by an astronomical source per unit time. It differs from the received radiative flux, which also depends on distance and geometry.
Articles by others on the same topic
Luminosity generally refers to the intrinsic brightness of an object, particularly in the context of astronomy. It is the total amount of energy emitted by a star, galaxy, or other astronomical object per unit time, typically measured in watts or in solar luminosities (where one solar luminosity is the luminosity of the Sun).