Milacovitch Cycles:

Question 1

Eccentricity:

Answer 1

path of the Earth orbiting the sun as it is not fixed; it changes from almost circular to mildly elliptical. A cycle reverting from circular to ellipticial to circular again happens every 100,000 years.

Question 2

Axial tilt:

Answer 2

earth spins on an axis for night and day at 23.5 degrees. Over 41,000 years, the tilt moves between 21.5 degrees and 25.5 degrees.

Question 3

Precession:

Answer 3

natural wobble cycle takes 26,000 years. it accounts for certain regions like northern Norway which has very long days then very long nights through the year.