Astrology or Science?

Nicola Scaffetta has posted an interesting paper over at Watts Up With That?  The paper presents a model for climate change that's driven mainly by a number of cyclical phenomena within the solar system.  Some of these phenomena (such as the distance between the sun and the earth) are not controversial; others are considered closer by many scientists to be closer astrology than to astronomy (such as spin-coupling between planets).  I don't fully understand the arguments about the controversial bits, and don't have time to dig into them today – but I'm intrigued by how closely his model backfits to measured data...