In the 1920s Milutin Milankovitch, a Serbian geophysicist and
astronomer, suggested that orbital changes could cause periodic cooling of the
Earth, with the coldest periods occurring every 41,000 years. Milankovitch
believed that the Earth’s orbital changes were the cause of glaciations. The
orbital eccentricity of the Earth follows a cycle of about 100,000 years and
the inclination axis varies periodically between 22° and 24.5° in a 41,000
years cycle. The inclination axis is responsible for the seasons; the greater
the inclination, the greater the contrast between summer and winter
temperatures. The precession of the equinoxes and the oscillations of the
rotation axis have a periodicity of 26,000 years. Milankovitch’s model explains
the changes in the contrast between the seasons, and this is confirmed by
oceanic sediments and fossils. However, since the overall exposure to the Sun
remains the same it does not account for glaciations. Astronomical cycles have
lasted for millions of years, while glaciations began 2.58 million years ago.
Orbital changes are at the most a co-factor of glaciations.
The Vital Needs Theory - page 96