Astronomy / Earth
Earth's orbital climate rhythms
Compare eccentricity, tilt and precession with summer sunlight at a selected latitude. Move through 400,000 years.
The model and its limits
Illustrative harmonic orbital cycles and daily-mean top-of-atmosphere insolation. This is not an orbital ephemeris, climate model or ice-age prediction.
Equations used in the module
Equations Q = S₀[H sin φ sin δ + cos φ cos δ sin H]/(π r²); H = acos(−tan φ tan δ).
