On a rotation curve you notice two points, A and B. Point B is twice as far from the center of the galaxy as point A, but they have the same velocity. How much more mass is contained inside the orbit of star B as opposed to star A?   half as much twice as much four times less four times more the same

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On a rotation curve you notice two points, A and B. Point B is twice as far from the center of the galaxy as point A, but they have the same velocity. How much more mass is contained inside the orbit of star B as opposed to star A?

 

half as much
twice as much
four times less
four times more
the same
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