1. The problem statement, all variables and given/known data The sun rotates around the center of the milky way galaxy at a distance of about 30,000 light years (1ly= 9.5*10^15m). if it takes about 200 million years to make one rotation, estimate the mass of our galaxy. Assume that the mass distribution of galaxy is concentrated mostly in a central uniform sphere. 2. Relevant equations G Msun Mgalamy / r^2 = Mgalaxy v^2/ r 3. The attempt at a solution r= (30000 * (9.5 * 10^5) ) m v= 2 * pi * r / 200 million years i know i have to convert the years into seconds is my setup right?