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Also known as radiant power
thumb|The Sun has an intrinsic luminosity of . In astronomy, this amount is equal to one [[solar luminosity, represented by the symbol L⊙. A star with four times the radiative power of the Sun has a luminosity of .]] Luminosity is an absolute measure of radiated electromagnetic energy per unit time, and is synonymous with the radiant power emitted by a light-emitting object. In astronomy, luminosity is the total amount of electromagnetic energy emitted per unit of time by a star, galaxy, or other astronomical objects.
AI overview
Luminosity is the total amount of electromagnetic energy that a star or other astronomical object emits per unit of time—essentially, how much light and energy it radiates into space. Astronomers use this measurement to compare the intrinsic brightness of different objects, such as the Sun, which serves as a reference point called one solar luminosity.
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