Question

10. This is more of a discussion problem Imagine that you were asked to estimate the Hill Sphere of the Sun Think about what this would physically mean. It would be the point in space where the Sun's gravitational influence (its mass is 2 x1030 kg) is exceeded by that of our neighbouring stars. Far out. This is the Alpha Centauri system - yes, it's not a single star, just to confuse the problem. But let's treat it as one. Alpha Centauri A has a mass of 1.1 solar masses. It's at an approximate distance of 4.37 light years. So where, roughly does the Hill Sphere end? Take a bit of time to investigate any other nearby stars and consider their possible gravitational influence too. With this in mind, in what context can you talk about the Hill Sphere of the Sun? 3 marks

Answer 1