More on Precession
Another aspect to consider is that the earth orbit is elliptical, with the sun at one of the two foci. My understanding is that our current position in the precession cycle means that we are closest to the sun in this orbit when tilted away from the sun in winter, and furthest from the sun when tilted toward it in summer. This gives us a more moderate climate than will have occurred 13000 years ago or 13000 years in future when we the earth will be closest to the sun while tilted toward it in summer etc..
Can anyone confirm or deny?