Answered: Assume that the orbital speed of a star… | bartleby

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1. Assume that the orbital speed of a star is measured at a distance of 15 kpc from
the center of our galaxy. If the rotational speed is 250 km/s, calculate the mass
inside the orbit of such stars.
1000 pc 206,265.AU
1kpc
a =r = (15kpc) = (15kpc)
AU
1pc

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