When that axis is tilted towards the sun<span>, the Northern Hemisphere receives more radiation than the Southern and vice versa when the axis is tilted away from the </span>sun<span>. The axis tilt doesn't actually change, but </span>its<span> orientation relative to the </span>Sun<span> changes as </span>Earth<span> moves in orbital </span>revolution<span> around the </span>Sun<span>.</span>
