The solar system moves around the galactic center in a roughly circular path at a radius of about 2.6x10^20m. The systems orbital speed around the center is 2.2x10^5m/s.
a) What is the period of this circular motion in years?
b) What is the sun's centripetal acceleration?
c) What is the magnitude of the centripetal force keeping the sun in this path given that the sun's mass is 1.99x10^30 kg?