1. The problem statement, all variables and given/known data Calculate the centripetal acceleration, in units of m/s2, of the Earth in its orbit around the Sun. Assume that the Earth's orbit is a circle of radius 148,022 thousand km. 2. Relevant equations v= 2 pi r/ T Ac = V^2/ r 3. The attempt at a solution I solve for V and get 29.48 m/s . For T, I use 3.15 x 10^7 seconds, and for r I use 1.48022 x 10^9 When I solve for Ac, I get 5.87 X 10-6 m/s2 I square 29.48 m/s and divide by 1.48022 x 10^9 The answer is 5.85 x 10-3 m/s2. I have no idea where I'm going wrong! I'm more concerned about why my answer is 10-6 when it should be 10-3 . Any ideas?