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abstraction > mathematical concept > number > quantity > mass > luminous mass |
luminous mass comparison table |
Subject | is an instance of | is a kind of | has definition |
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mass | quantity | The measure of the inertia of an object, determined by observing the acceleration when a known force is applied. The gravitational force acting on an object is found to be proportional to its mass, as is the gravitational force that it exerts on other objects. | |
luminous mass | mass | The mass contributed by luminous matter in galaxies (see missing mass). Luminous mass density, 5 × 10-32 g cm-3 for H0 = 50 km s-1 Mpc-1. |
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