1. The problem statement, all variables and given/known data Three stars, each with the mass of our sun (1.9891E31 kg), form an equilateral triangle with sides long. The triangle has to rotate, because otherwise the stars would crash together in the center. What is the period of rotation? 2. Relevant equations F1=GM2/r2 ƩF=0 F2=ma a=4π2r/T2 3. The attempt at a solution F1=2.639E26 Because the sum of the forces is equal to zero F1=F2 2.639E26=(1.9891E31)*a a=.000133m/s2=4π2/T2 T=5.45E8 s Do I have to do something else because there's three stars instead of two?