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Why is there a main sequence mass-luminosity relation?
Center
The point that is equally distant from all points on the circumference of a circle or sphere.
Radius
The length measured from a circle's midpoint to any location along its outer edge.
Center
The middle point of a shape, object, or group of points, often equidistant from all outer edges or surfaces.
Radius
The distance from the center to the circumference of a circle or sphere.
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