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﹒The intrinsic brightness of a celestial object, measured as the total amount of energy emitted per unit of time.
﹒The quality or state of being luminous; brightness or radiance.
﹒A measure of the perceived brightness of a light source.
﹒The astronomer measured the luminosity of the distant star to determine its age.
﹒The moon's soft luminosity cast a gentle glow over the quiet garden.
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