The Orbital Climate Guide
Understand Each Milanković Cycle
Start with one motion, then connect the full pattern. These concise guides separate astronomical geometry, seasonal sunlight, climate feedbacks, and modern warming.
Five Focused Guides
Choose a question
Eccentricity
Learn how Earth’s orbital eccentricity changes orbit shape, modulates precession, and contributes to the pacing of ice ages.
Obliquity
Understand Earth’s 41,000-year obliquity cycle, how axial tilt changes the strength of seasons, and why high latitudes respond strongly.
Precession
Learn how axial and orbital precession shift the timing of seasons relative to perihelion, producing climatic cycles near 19,000 and 23,000 years.
65°N Insolation
Discover why scientists use Northern Hemisphere summer insolation near 65°N to study orbital pacing, snow survival, and ice-age cycles.
Modern Warming
No: Milanković cycles unfold over tens of thousands of years and do not explain today’s rapid warming, which is driven primarily by human greenhouse-gas emissions.