Why do people who live in Australia never see Polaris?

Answer 1

People who live in Australia can indeed see the star Polaris. They just have to visit the northern hemisphere to do it. The earth's axis has a reasonably stable orientation toward north/south; thanks to the stabilizing effect of the moon, it doesn't swing wildly out of place. So people viewing the sky from closer to the north pole can see the northern sky and not the southern sky. People viewing the sky from closer to the south pole can see the southern sky and not the northern. Polaris is very close to the point the north pole actually points to, which is why it is called 'Polaris', the pole star.