Precession of the Equinoxes
- From: AK47 <ak47cats@xxxxxxxxxxxxxxxxxxx>
- Date: Fri, 23 Jun 2006 14:31:45 -0500
Quotation from "The Weather Makers: How Man is Changing the Climate and
What it Means for Life on Earth" by Tim Flannery (Melbourne, Australia:
2005)
"The ?cycle which runs its course every 22,000 [sic] years, concerns the
wobble of the Earth on its axis. During the course of this cycle, Earth's
axis shifts from pointing at the Pole Star [sic] to pointing at Vega. This
affects the intensity of the seasons. When Vega marks true north, winters
can be bitterly cold and summers scorchingly hot."
I cannot understand this. I can see how two other long-term cycles of the
earth's motion (the axial tilt and the orbital eccentricity) can affect
climate, but I fail to see the effect of precession.
Can anyone explain?
.
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