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abstraction > mathematical concept > number > quantity > mass > mass of the Galaxy
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mass of the Galaxy comparison table
Subject is an instance of is a kind of has value has definition
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.
mass of the Galaxymass 1.8 × 1011 MSunThe mass of the Milky Way.

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