Solar system. Earth orbit is influenced by the gravity of the large planets, mostly Jupiter and Saturn.
Milankovitch parameter are excentricity, obliquity, and precession
Milankovitch variations (red, green, blue) influence solar radiation on the northern hemisphere. Solar forcing at 65°N in summer (yellow) is essential for the development of ice sheets. The resulting curve from the addition of the three Milankovitch parameters reflects the climatic variations as reconstructed from sediment and ice cores (black). Hays et al. 1976 doi:10.1126/science.194.4270.1121
Northern hemisphere, ice coverage (black) during interglacial
Northern hemisphere, ice coverage during glacial
Southern hemisphere, ice coverage during interglacial