The meaning of LUMINOSITY is the quality or state of being luminous.

In SI units, luminosity is measured in joules per second, or watts. In astronomy, values for luminosity are often given in the terms of the luminosity of the Sun, L⊙.

Luminosity, in astronomy, the amount of light emitted by an object in a unit of time. The luminosity of the Sun is 3.846 × 1026 watts (or 3.846 × 1033 ergs per second).

Astronomy. the brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic brightness 23 times as great as that of the sun.

LUMINOSITY definition: 1. the state of producing or reflecting bright light; the state of appearing to shine: 2. the…. Learn more.

luminosity noun Exceptional brightness and clarity, as of a cut and polished stone:

Definition of luminosity noun from the Oxford Advanced Learner's Dictionary. the fact of shining in the dark; the ability to give out light. The moon was shining enough to give a ghostly luminosity to the …

Nov 5, 2025 · Luminosity and brightness are related concepts, but they are not the same thing. Brightness refers to how an object appears to an observer, while luminosity is a measure of the total …

Luminosity is the total amount of energy emitted by a star, galaxy, or other celestial object per unit time. It is often used to describe the brightness of stars and is measured in terms of solar luminosities.

Luminosity generally refers to the brightness of an object or source of light. It encompasses the intensity and quality of light emitted or reflected by an object.