(uncountable) the state of being luminous, or a luminous object; brilliance or radiance / (physics) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor

plural of luminosity

(astronomy) An estimate of the distance of a body based on its luminosity and the inverse square law.

(astronomy) A relative measure of the relationship between stellar magnitude and the distribution of stars between magnitudes

plural of luminosity distance

(physics) The maximum luminosity of a source where the continuum radiation force outwards balances the gravitational force inwards in hydrostatic equilibrium.

plural of Eddington luminosity