[speach (Simon)]

Remember the earth is tilted at aprox. 23 deg from the plane of it's orbit. The tilt is 'Fixed' with reference to the sun, so in the southern hemisphere summer the sun , at noon is about 23 deg higher, then at noon in the winter, and so the Antarctic is in sun light in summer and darkness in winter. Now to the drift of the rising and setting sun. If the tilt wasn't there the days would be of the same length all the year but because of the tilt so we get different length days. So in summer the sun rises south more because tilt is towards the sun whereas in winter the northern hemisphere is tilted towards the sun and southern is away so the sun rises more northerly . hope this helps. If all else fails get two oranges, say, stick a pencil through one (the earth) place them apart by say 2 metres tilt one about 23 deg observe where the pencil is pointing then 180 around the central one (sun) keep the pencil pointing at the object you chose on the ceiling. you will now see the 'sun' is lower, with reference to the surface of the orange. And what was 'day' facing the sun is now 'night'. This also explains celestial progression.