To start, let's get a feel for how large the acceleration due to the sun's gravity is near the earth's orbit, where the spacecraft will depart. Find what this acceleration would be at a point that is 1.4E 11 m from the sun. The mass of the sun is 1.99E 30 kg. Enter your answer as a fraction of g (the acceleration due to gravity near the surface of the earth). This part of the problem has nothing to do with the sun's radiation - we're just trying to get a sense of scale.